PAGE 23
                                                     Exhibit 99.1
  P   R   O   S   P   E   C   T   U   S
  
                                RENTECH, INC.
                 500,000 Shares Common Stock ($.01 par value)
  
     THESE SECURITIES ARE SPECULATIVE AND INVOLVE A HIGH DEGREE OF RISK. 
                    SEE RISK FACTORS BEGINNING AT PAGE 4
  
       This Prospectus relates to 500,000 shares (the "Shares") of common
  stock, $.01 par value per share (the "Common Stock"), of RENTECH, INC.
  (the "Company").  The Selling Shareholders are identified in this
  Prospectus under the heading "Selling Shareholders."  The Shares may be
  offered by Selling Shareholders from time to time:  (i) in transactions
  in the over-the-counter market, on the automated inter-dealer system on
  which shares of Common Stock of the Company are then listed, in
  negotiated transactions, or a combination of such methods of sale, and
  (ii) at market prices prevailing at the time of sale, at prices related
  to such prevailing market prices, or at negotiated prices.  The Selling
  Shareholders may effect such transactions by selling the Shares to or
  through securities broker-dealers.  Such broker-dealers may receive
  compensation in the form of discounts, concessions, or commissions from
  the Selling Shareholders and/or the purchasers of the Shares for whom
  such broker-dealers may act as agent or to whom they sell as principal,
  or both (which compensation as to a particular broker-dealer might be in
  excess of customary commissions).  See "Selling Shareholders" and "Plan
  of Distribution."  Selling Shareholders may also sell such shares
  pursuant to Rule 144 or Rule 144A under the Securities Act of 1933 if the
  requirements for the availability of such rules have been satisfied. 
  
       The Shares were issued to the Selling Shareholders upon exercise of
  options granted to them under the Company's employee benefit plans.  None
  of the proceeds from the sale of the Shares by the Selling Shareholders
  will be received by the Company.  The Company has, however, received the
  net proceeds from the exercise of the stock options described herein
  under "Use of Proceeds."  The Company has agreed to bear all expenses
  (other than underwriting discounts, selling commissions, and underwriter
  expense allowance, and fees and expenses of counsel and other advisers to
  the Selling Shareholders) in connection with the registration and sale of
  the Shares being offered by the Selling Shareholders.  The Company has
  agreed to indemnify the Selling Shareholders against certain liabilities,
  including liabilities under the Securities Act of 1933, as amended (the
  "Securities Act").
  
       The Common Stock of the Company is listed and traded on NASDAQ on
  the Small Cap Market under the symbol "RNTK."  On February 3, 1998, the
  last reported sale price of the Common Stock was $.9375 per share. 
  
       THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
  SECURITIES AND EXCHANGE COMMISSION, NOR HAS THE COMMISSION PASSED UPON
  THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE
  CONTRARY IS A CRIMINAL OFFENSE.
  
               The date of this Prospectus is February 9, 1998
  
  
  
  
                                                      PAGE 24
  
                            AVAILABLE INFORMATION
  
       The Company is subject to the informational requirements of the
  Securities Exchange Act of 1934 (the "Exchange Act") and in accordance
  therewith, files reports and other information with the Securities and
  Exchange Commission (the "Commission").  Proxy statements, reports and
  other information concerning the Company can be inspected and copied at
  Room 1024 of the Commission's office at 450 Fifth Street, N.W.,
  Washington, D.C. 20549, and the Commission's Regional Offices in Denver
  (Suite 4800, 1801 California Street, Denver, Colorado 80202), New York
  (Room 1228, 75 Park Place, New York, New York 10007), and Chicago (Suite
  1400, Northwestern Atrium Center, 500 West Madison Street, Chicago,
  Illinois 60621-2511), and copies of such material can be obtained from
  the Public Reference Section of the Commission at 450 Fifth Street, N.W.,
  Washington, D.C. 20549, at prescribed rates.  This Prospectus does not
  contain all information set forth in the Registration Statement of which
  this Prospectus forms a part and exhibits thereto which the Company has
  filed with the Commission under the Securities Act and to which reference
  is hereby made.  
  
                     DOCUMENTS INCORPORATED BY REFERENCE
  
       The Company will provide, without charge, to each person to whom a
  copy of this Prospectus is delivered, including any beneficial owner,
  upon the written or oral request of such person, a copy of any or all of
  the documents incorporated by reference herein (other than exhibits to
  such documents, unless such exhibits are specifically incorporated by
  reference into the information that the Prospectus incorporates). 
  Requests should be directed to: 
  
       Rentech, Inc.
       1331 17th Street, Suite 720
       Denver, Colorado 80202
       Telephone number:  (303) 298-8008
       Attention:  James P. Samuels, Chief Financial Officer
  
       The following documents filed with the Commission by the Company
  (File Number 0-19260) are hereby incorporated by reference into this
  Prospectus:
  
       The Company's Form 10-KSB/A dated January 15, 1998 amending its
  Annual Report on Form 10-KSB dated December 29, 1997 for the
  12-month period ended September 30, 1997.
  
       All documents filed with the Commission by the Company pursuant to
  Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act subsequent to the
  date of this Prospectus and prior to the termination of the offering
  registered hereby shall be deemed to be incorporated by reference into
  this Prospectus and to be a part hereof from the date of the filing of
  such documents.  Any statement contained in a document incorporated or
  deemed to be incorporated by reference herein shall be deemed to be
  modified or superseded for purposes of this Prospectus to the extent that
  a statement contained herein or in any subsequently filed document which 
  
  
  
  
  
  
                                                      PAGE 25
  
  also is or is deemed to be incorporated by reference herein modifies or
  supersedes such statement.  Such statement so modified or superseded
  shall not be deemed, except as so modified or superseded, to constitute a
  part of this Prospectus.  
  
  
                                 SUMMARY
  
  The Company
  
       Rentech, Inc. ("Rentech" or the "Company") was organized as a
  Colorado corporation in 1981 to develop and exploit processes for the
  conversion of natural gas and other low-value carbon-bearing gases and
  solids into valuable liquid hydrocarbons, including premium diesel fuel,
  naphthas and waxes.  The gas-to-liquids technology developed by the
  Company ("Rentech Process Technology" or "Technology") is protected by a
  series of patents issued by the U.S. Patent Office.  The ability of the
  Technology to convert carbon-bearing gases into valuable liquid
  hydrocarbons has been validated in two pilot plants operated periodically
  between 1982 and 1989, in a 235 barrel per day commercial scale facility
  in 1992 and 1993, and in a third pilot plant presently being operated in
  Rentech's test facility at Pueblo, Colorado.  Rentech's 
  gas-to-liquids Technology has been licensed for use in India in a 360
  barrel per day plant that the licensee is now beginning to construct. 
  
       During March 1997, the Company entered into the business of
  manufacturing and selling water-based stains, sealers and coatings by
  purchasing the assets of Okon, Inc.  The Company is continuing and
  expanding the 20-year old business of Okon as a wholly-owned subsidiary. 
  Okon, Inc. sells environmentally clean, water repellant sealers, coatings
  and stains for wood, concrete and masonry.  The customers are the
  construction industry and architects.  Okon, Inc. presently provides
  Rentech's primary source of revenues. 
  
       During July 1997, Rentech agreed with ITN Energy Systems, Inc., a
  privately-owned Colorado corporation, to enter into a new business called
  ITN Electronic Substrates LLC.  Rentech owns 50% of this new entity.  The
  LLC intends to engage in the manufacture and sale of several types of
  flexible thin-film on which it has electronically deposited metals with
  unique properties, such as copper and molybdenum, that provide conductive
  paths to which computer chips may be attached.  The new business intends
  to begin its first activities and begin production in 1998.  The
  customers are expected to be contract manufacturers in the computer,
  aerospace and medical instrument industries, as well as large
  end-users which use the substrates to manufacture their own products. 
  
       The Company's long-term plan is to diversify into three industry
  groups centered around its three present lines of business.  Rentech
  plans to continue licensing its gas-to-liquids Technology in a
  petrochemical group, to establish an environmental and industrial
  products group that includes products such as the stains, sealers,
  repellants and other coatings produced by Okon, Inc., and to develop an
  advanced technology group with such technologies as the new business of
  ITN Electronic Substrates LLC. 
  
  
  
  
  
  
  
                                                      PAGE 26
  
       The Company is continuing its original business of licensing its
  gas-to-liquids Technology, including sale of its proprietary catalyst
  used in the conversion process.  Licenses are granted in exchange for
  license fees and ongoing royalties on the production of liquid
  hydrocarbons from conversion plants that use the Technology and are
  constructed and owned by licensees.  Rentech has licensed its Technology
  for use in India for a plant now under construction by its Indian
  licensee at Arunachal Pradesh, India.  Rentech is providing its Indian
  licensee engineering design and technical services under contract, and
  will provide such services to subsequent licensees for their use in
  constructing their plants, together with engineering services and startup
  operational support services on a fee basis for licensed plants.  In
  addition, Rentech may reserve the right to contract for the engineering
  and supply the synthesis gas conversion reactor modules that are
  essential to use of its Technology in conversion plants.  Rentech is not
  now receiving significant revenues from its gas-to-liquids Technology.  
  
       The Rentech Technology uses as feedstock natural gas from gas wells
  that are not producing or that flare gas, or synthesis gas, a mixture of
  hydrogen and carbon monoxide gases, produced by gasification of coal and
  other carbonaceous materials.  These sources of fuel are in abundant
  supply worldwide.  A potential feedstock of growing importance is the
  heavy, high sulphur fuels at refineries commonly known as refinery
  bottoms.  Other sources of feedstock include methane, a gas collected
  from coal beds, as well as industrial off gases. The Technology can
  provide a means of utilizing gas resources that are currently
  unmarketable due to their remote locations or because of the presence of
  diluents such as carbon dioxide or nitrogen. 
  
       The diesel fuel produced by using the Technology has been tested to
  have a sulphur content below detectable limits and to have improved
  combustion characteristics when compared to commercial No. 2 diesel fuel. 
  These qualities make it less polluting than presently available diesel
  fuel, and, unlike alternative fuels such as methanol or compressed
  natural gas, does not require any engine or vehicle modifications for
  use.  Based upon prices of crude oil at about $18 per barrel, and
  commercial No. 2 diesel fuel at approximately $.50 per gallon, management
  believes the diesel fuel can be produced and sold at competitive prices
  and, particularly in view of the requirements of the federal Clean Air
  Act, may be saleable at premium prices.  The Technology has the potential
  of reducing, in this and other countries, dependency upon imports of
  crude oil and petroleum products by converting the large fields of
  shut-in natural gas reserves in this country into liquid that can be
  inexpensively trucked to users.
  
       The executive offices of the Company are located at 1331 17th
  Street, Suite 720, Denver, Colorado 80202, telephone (303) 298-8008, fax
  (303) 298-8010.
  
  
                                 RISK FACTORS
  
       The securities offered hereby involve a high degree of risk. 
  Prospective investors, prior to making an investment, should carefully 
  
  
  
  
  
                                                      PAGE 27
  
  
  consider the following risks and speculative factors inherent in and
  affecting the business of the Company and an investment in the Shares. 
  In accordance with the provisions of the Private Securities Litigation
  Reform Act of 1995, the cautionary statements set forth below identify
  important factors that could cause actual results to differ materially
  from those in the forward-looking statements contained in this
  prospectus.
  
       1.  Lack of Profitable Operations.  From inception on December 18,
  1981, through September 30, 1997, the Company has sustained losses
  aggregating $9,735,824.  For the year ended September 30, 1997 and the
  nine month period ended September 30, 1996, the Company had net losses of
  $1,375,686 and $392,478, respectively.  The increase of approximately
  350% in loss for the twelve month period in 1997 compared to the nine
  month period in 1996 is due to a decrease in contract revenues and
  license fees of $295,176, increase in interest expense of approximately
  $289,000 from the addition of $1,250,500 in debt and extraordinary gain
  in 1996 of $200,434.  Increases in 1997 costs over 1996 are attributable
  in general to the longer fiscal period in 1997 and in particular to
  public relations costs, and approximately $100,000 in hiring costs of a
  chief financial officer.  Profit contributed by Okon from its acquisition
  in March 1997 partially offset the increases in costs due to the longer
  fiscal period.  The losses since inception raise substantial doubt about
  the ability of the Company to continue as a going concern, as stated in
  the report of independent certified public accountants contained in the
  September 30, 1997 audited financial statements.  There are no assurances
  that the Company will complete acquisitions of revenue producing
  businesses or that the Company's licensees will complete construction of
  plants using the Technology, or that any gas-to-liquids conversion plants
  that are completed will be operated profitably or provide engineering
  design fees, license fees or royalties for the Company. 
  
       2.  Economic Feasibility of Gas-to-Liquids Technology Not Assured. 
  Whether any full-scale conversion plant using the Technology can be
  profitably operated depends upon the availability of low-cost feedstock
  and the economic feasibility or efficiency of the Technology, as well as
  a ready market for the end products (primarily premium diesel fuel,
  naphthas and waxes) at reasonable prices.  The diesel fuel produced by
  the Technology has not been subjected to long-term engine tests to
  determine if there are any adverse effects.  No in-depth cost or price
  studies have been prepared by independent third parties for the Company. 
  Any significant decrease in prices of crude oil below approximately $16
  or of commercial No. 2 diesel fuel below approximately $.50 per gallon
  could have a material adverse effect upon the economic potential of the
  Technology.
  
       3.  Dependence upon Management.  At this stage of the Company's
  development, economic success of the gas-to-liquids Technology depends
  upon design of gas conversion plants and their startup to achieve optimal
  process plant operations, and establishment of the Company's advanced
  technology business.  Both require knowledge, skills, and relationships
  unique to the Company's technical personnel.  Moreover, to successfully
  compete with its gas conversion Technology and advanced technology, the
  Company will be required to engage in continuous research and development 
  
  
  
  
  
                                                      PAGE 28
  
  regarding processes, products, markets and costs.  Loss of the services
  of the executive officers of the Company, particularly Drs. Charles B.
  Benham or Mark S. Bohn due to their technical expertise and knowledge
  related to the gas conversion Technology, could be expected to have a
  material adverse effect upon the Company.  The Company's employment
  contract with Dr. Benham, expires on March 31, 1999.  It has no
  employment contract with Dr. Bohn who works for the Company on a
  part-time basis as needed. 
  
       4.  New Business Risks Associated With Entry into Advanced
  Technology Business.  The likelihood of success of the Company's entry
  into the advanced technology business of producing and selling flexible
  thin-film substrates by electronic deposition through ITN Electronic
  Substrates LLC, and the Company's proposed entry into other new
  businesses involving advanced technology, must be considered in view of
  the problems, expenses, difficulties, complications and delays frequently
  encountered with starting up a new business, including the development of
  new technology and the marketing of new products.  The Company has no
  history of operations in these lines of business upon which to evaluate
  its prospects for future operating or financial success.  
  
       5.  Risk of Technological and Regulatory Change and Requirement for
  New Products.  The market for advanced technology products is
  characterized by rapidly changing technology, new legislation and
  regulations, and evolving industry standards.  The introduction of
  products embodying new technology, the adoption of new legislation or
  regulations, or the emergence of new industry standards could render the
  LLC's products and future products, if any, obsolete and unmarketable. 
  The success and growth of the LLC will depend, in part, upon its ability
  to anticipate changes in technology, market needs, law, regulations, and
  industry standards, and to successfully develop and introduce new and
  enhanced products on a timely basis.  The LLC will need to devote a
  substantial amount of its efforts to research and development as well as
  to sales and marketing. 
  
       6.  Effect of Competition.  The products of the 
  gas-to-liquids Technology will compete with other petroleum products,
  including products produced by similar methods.  To a great extent,
  competition in this business will be based upon price, although
  compliance with environmental laws may create demand for the Company's
  low aromatic, sulphur-free diesel fuel even at premium prices.  Others
  have and are actively seeking to develop technology that will enable
  results similar to the Company's processes for conversion of 
  gas-to-liquid hydrocarbons.  The most likely competition will come from
  major corporations in the oil and gas and synthetic fuel industries that
  have vastly greater technical and financial resources than the Company. 
  The stains, sealers and coatings industry is highly competitive and has
  historically been subject to intense price competition.  It is estimated
  that there are approximately 800 coatings manufacturers in the United
  States, many of which are small companies that provide intense
  competition within regional and local markets, especially with respect to
  lower price coatings and custom made specialty items required on a
  short-term delivery basis.  The Company's primary competition is
  approximately one dozen other manufacturers, of which at least five are
  large, better capitalized, and have more extensive distribution networks. 
  Other manufacturers are large 
  
  
  
  
  
                                                      PAGE 29
  
  diversified corporations, the assets of which are vastly greater than
  those of the Company, which compete on a nationwide basis.  The Company's
  overall position in the coatings industry, as one of the smallest
  manufacturers, is  minor.  The advanced technology industry producing
  thin-film substrates by electronic deposition is highly competitive. 
  Competitors include at least a dozen of United States and international
  competitors, many of which are large diversified businesses, and the
  assets of which are greatly superior to those of the Company. 
  Competition for the advanced technology products is based upon price,
  quality, and quantity of the products, as well as reputation, none of
  which have been established by the Company because it is only now
  entering into this business.  
  
       7.  Need for Inexpensive Feedstock to Produce
  Gas-to-Liquids Products that Are Competitively Priced.  Successful
  exploitation of the Company's gas-to-liquids Technology depends upon the
  availability of substantial quantities of carbon-bearing,
  low-cost feedstock for plants that use the Technology.  Management
  believes such feedstock gas will be readily available from sources such
  as natural gas wells that are not producing gas because of remote
  locations, and from other sources such as synthesis gas produced by
  gasification of coal, as well as industrial off gases.  However, in the
  event low-cost gas cannot be obtained, then plants using the Technology
  may not be able to produce products for sale at competitive prices. 
  Although the cost of diesel fuel produced at the plants may require that
  it be sold at prices somewhat higher than competing diesel fuels,
  management expects that many users, particularly those subject to the
  increasingly strict mandates of the Clean Air Act, will pay a premium. 
  If prices for crude oil are in the range of $18 per barrel and diesel
  fuel at approximately $.50 per gallon or higher, management believes that
  the diesel fuel produced using the Technology can be priced
  competitively, but no such assurance can be given.  Also, should oil or
  commercial No. 2 diesel fuel prices both decrease significantly, any
  market for the Company's diesel fuel that may hereafter exist could be
  adversely affected.  
  
       8.  Lack of Adequate Capital to Exploit the Gas-to-Liquids
  Technology.  The capital cost of gas conversion plants and natural gas
  fields or other sources of feedstock that use the Company's Technology
  requires more capital than is available to the Company or to many of its
  potential licensees.  While the Company does not presently plan to build
  its own plants for use of the Technology, and expects its licensees to
  acquire feedstock and build and own plants for which they are licensed by
  the Company, many potential licensees are unable to finance the
  construction costs and acquire feedstock, or to do so readily.  These
  limitations have slowed and will continue to delay use of the Technology
  and resulting revenues to the Company from use of the Technology unless
  the Company is able to join with other better capitalized companies to
  commercially exploit the Technology.  There are no assurances that such
  joint arrangements will be available or acceptable to the Company. 
  
       9.  Lack of End Product Purchase Contracts.  The Company has
  previously contacted various potential purchasers of the products of the
  gas-to-liquids Technology, primarily users of diesel fuel, and potential
  purchasers of the thin-film substrates, but has no contracts for purchase
  of such end products.  The Company's gas-to-liquids licensees are 
  
  
  
  
  
                                                      PAGE 30
  
  responsible for marketing products from gas conversion plants constructed
  by them.  Because the diesel fuel produced is relatively
  non-polluting, it is believed that metropolitan transportation districts
  and other users of fuel in urban areas having air pollution problems may
  be interested in purchasing such fuel, possibly at a premium over the
  price of commercial diesel fuel.  However, no such assurance can be
  given. 
  
       10.  Risk of Expatriation Laws.  In its offshore operations
  involving the gas-to-liquids Technology, the Company expects it will
  usually be paid design contract fees, license fees, royalties and other
  compensation denominated in the currency of the subject country.  The
  Company will thus be subject to the risk of fluctuation of currency
  exchange rates.  Whenever possible, however, management intends to
  negotiate payment in U.S. dollars.  In addition, some countries have laws
  that may adversely affect the ability of the Company to remove funds from
  that country, may impose taxes upon such removal, or limit the amount of
  the payments that a licensee can make to the Company.
  
       11.  Uninsured Losses Related to the Gas-to-Liquids Technology. 
  Certain types of losses (generally losses of a catastrophic nature such
  as damage to a conversion plant in which the Company may hold an interest
  caused by fire, explosion, war, earthquakes and floods) are either
  uninsurable or not economically insurable.  Should an uninsured or
  partially insured loss occur, the Company could suffer a loss of invested
  capital and any profits that might otherwise have been anticipated.
  
       12.  Limitation on Protection of Intellectual Property.  The Company
  relies on a combination of patent, trade secret, copyright and trademark
  law, nondisclosure agreements and technical security measures to protect
  its intellectual property rights in its lines of business.  There are no
  assurances that these rights or any additional patents will be adequate
  to protect the Company's interest in present and any future intellectual
  property.  Patents and copyrights may be contested by competitors and
  held invalid or not effective to preclude others from using similar
  concepts and functionally similar processes.  The protection afforded to
  intellectual property by other nations is generally not as effective as
  that provided within the United States. 
  
       13.  No Expectation of Dividends.  No dividends have been paid on
  the Company's Common Stock since inception, and it is highly unlikely
  that any dividends will be paid in the near term due to existing capital
  needs.  However, if the business plan is successful, the Company may
  generate substantial revenue from its lines of business, which, barring
  unanticipated capital commitments, is expected to allow payment of
  dividends.  No assurance can be given, however, that the Company will
  ever pay, or be in a position to pay dividends.
  
       14.  Potential Dilution Due to Exercise of Stock Options and
  Additional Private Offerings.  The Company has committed to issue a
  substantial number of shares of Common Stock upon exercise of presently
  outstanding stock options.  The Company may issue additional shares of
  its Common Stock or warrants for the purchase of Common Stock to raise
  operating capital or acquire other businesses or assets.  Issuance of
  
  
  
  
                                                      PAGE 31
  
  additional shares of Common Stock will reduce the percentage ownership
  interest in the Company represented by shares of Common Stock acquired by
  purchasers and may dilute the value of their interest in the Company.
  
       15.  Potential Dilution of Shareholder Rights by Issuance of
  Preferred Stock.  The Company is authorized to issue up to 1,000,000
  shares of preferred stock, par value $10 per share.  Preferred stock may
  be issued in one or more series, the terms of which will be determined at
  the time of issuance by the board of directors without any requirement
  for shareholder approval.  Such rights may include voting rights,
  preferences as to dividends and, upon liquidation, conversion and
  redemption rights, and mandatory redemption provisions pursuant to
  sinking funds or otherwise.  Conversion of the preferred stock or
  issuance of additional preferred stock could affect the rights of the
  holders of Common Stock and therefore reduce the value of the Common
  Stock.  Rights could also be granted to holders of preferred stock
  hereafter issued that could reduce the attractiveness of the Company as a
  potential takeover target.  See "DESCRIPTION OF  COMMON STOCK AND
  PREFERRED STOCK."  
  
       16.  Deterrence of Tender Offers by Fair Price Provisions.  The
  Company's Articles of Incorporation include provisions designed to assure
  shareholders, to the extent possible, that any hostile takeover attempt
  or merger of the Company with a significant shareholder or its affiliate
  will result in shareholders receiving a fair value for their securities. 
  These provisions include grouping of the board of directors into three
  classes with staggered terms; a requirement that directors may be removed
  without cause only with the approval of the holders of 66-2/3% of the
  outstanding voting power of the capital stock of the Company; and a
  requirement that the holders of not less than 66-2/3% of the voting power
  of the outstanding capital stock of the Company approve certain business
  combinations of the Company with any holder of more than 10% of such
  voting power or an affiliate of any such holder unless the transaction is
  either approved by at least a majority of the uninterested and
  unaffiliated members of the board of directors or unless certain minimum
  price and procedural requirements are met.  These provisions could deter
  a hostile tender offer by a third party for the purchase of some or all
  of the Company's outstanding securities and could have the effect of
  entrenching management.  See "DESCRIPTION OF COMMON STOCK AND PREFERRED
  STOCK."
  
       17.  Volatility of Stock Prices; Penny Stock Rules.  The
  over-the-counter markets for securities such as the Company's Common
  Stock historically have experienced extreme price and volume
  fluctuations.  These broad market fluctuations, variations in the
  Company's results of operations, and other economic and industry trends
  may adversely affect the market price of the Company's Common Stock. 
  Although the Common Stock is listed for quotation on the NASDAQ SmallCap
  Market, there are no assurances that the Common Stock will meet the
  minimum bid price of $1 or other listing requirements.  Accordingly,
  there can be no assurance that the Common Stock will remain eligible for
  quotation on NASDAQ.  In the event of ineligibility and delisting, the
  Common Stock would become subject to rules of the Securities and Exchange
  Commission regulating broker-dealer practices in connection with
  transactions in "penny stocks."  The penny stock rules may make many
  
  
  
  
  
                                                      PAGE 32
  
  brokers unwilling to engage in transactions in the Company's Common Stock
  because of the added burdens imposed on the broker by those rules to make
  disclosures and to determine and establish the suitability of each 
  prospective purchaser of the Common Stock.  The penny stock rules may
  make it more difficult for purchasers of Common Stock in this offering to
  dispose of their securities and could adversely affect the market price
  of the Common Stock.  
  
  
  Use of Proceeds
  
       The Shares are being offered for the account of Selling
  Shareholders.  The Company will not receive any proceeds from the sale of
  their Shares.  The Company will receive approximately $83,625 if all of
  the stock options presently issued pursuant to the Plan for the purchase
  of 450,000 shares of Common Stock are exercised, of which there is no
  assurance.  The Company intends to use any net proceeds from the exercise
  of the stock options for working capital and general corporate purposes. 
  
  
                             RECENT DEVELOPMENTS
  
       During July 1997, Rentech agreed with ITN Energy Systems, Inc., a
  privately-owned Colorado corporation, to enter into a new business called
  ITN Electronic Substrates LLC.  Rentech owns 50% of this new entity.  The
  LLC will manufacture and sell flexible thin-film substrates by electronic
  deposition.  The new business intends to begin its first activities and
  begin production in 1998.  The customers are expected to be contract
  manufacturers in the computer, aerospace and medical instrument
  industries, as well as large end-users which use the substrates to
  manufacture their own products. 
  
  
                             SELLING SHAREHOLDERS
  
  
     The shares of Common Stock owned by the Selling Shareholders and the shares of Common Stock (the
"Shares") underlying stock purchase warrants held by them are being offered by the Selling Shareholders
identified in the following table.

                                                                           Number of Shares
                                                             Number of     to be Beneficially Owned
Name of                              Number of Shares        Shares That   On Completion of the Offering
Selling                              Beneficially Owned      May Be                                % of
Shareholder                          Record      Indirect    Offered(1)    Record    Indirect      Class
- -----------------                    ------      --------    ----------    ------    --------      -----
                                                                                 
Charles B. Benham                      275,440     488,380      80,000     275,440     408,380      2.2%
Mark S. Bohn                           443,431     289,592      20,000     443,431     269,592      2.3%
Ronald C. Butz                         533,583     488,380      80,000     533,583     408,380      3.1%
James P. Samuels                       127,500     579,500      10,000     127,500     569,500      2.2%
Erich W. Tiepel                        123,277     272,448      20,000     123,277     252,448      1.2%
Dennis L. Yakobson                     404,354     499,900      80,000     404,354     419,900      2.7%
                                                             ---------
      Total                                                  290,000(1)
- ---------------
<FN>
      *Less than 1%
<F1>  Includes shares of common stock issuable upon exercise of presently issued stock options.
</FN>

  
  
                                                      PAGE 33
  
  
       To the knowledge of the Company, each of the Selling Shareholders is
  presently an officer, director or employee of the Company or has held an
  office, position or other material relationship with the Company, its
  predecessors or affiliates during the past three years. 
  
       Each Selling Shareholder has represented that he purchased the
  Common Stock for investment and with no present intention of distributing
  or reselling such Shares unless registered for resale.  However, in
  recognition of the fact that holders of restricted securities may wish to
  be legally permitted to sell their Shares when they deem appropriate, the
  Company has filed with the Commission under the Securities Act a Form
  S-3 registration statement of which this Prospectus forms a part with
  respect to the resale of the Shares from time to time in the
  over-the-counter market or in privately negotiated transactions.  The
  Company has agreed to prepare and file such amendments and supplements to
  the Registration Statement and to use its best efforts to obtain
  effectiveness of the Registration Statement and to keep the Registration
  Statement effective until all the Shares offered hereby have been sold
  pursuant thereto, until such Shares are no longer, by reason of Rule 144
  under the Securities Act or any other rule of similar effect, required to
  be registered for the sale thereof by the Selling Shareholders, or for a
  period of 180 days, whichever occurs first. 
  
       Certain of the Selling Shareholders, their associates and affiliates
  may from time to time be customers of, engage in transactions with,
  and/or perform services for the Company or its subsidiaries in the
  ordinary course of business.  
  
  
                             PLAN OF DISTRIBUTION
  
       The sale of the Shares by the Selling Shareholders may be effected
  from time to time (i) in transactions in the over-the-counter market, in
  negotiated transactions, or through a combination of such methods of
  sale, and (ii) at market prices prevailing at the time of sale, at prices
  related to such prevailing market prices or at negotiated prices.  The
  Selling Shareholders may effect such transactions by selling the Shares
  to or through broker-dealers, and such broker-dealers may receive
  compensation in the form of discounts, concessions, or commissions from
  the Selling Shareholders and/or the purchasers of the Shares for which
  such broker-dealers may act as agent or to whom they may sell, as
  principal, or both (which compensation as to a particular
  broker-dealer may be in excess of customary compensation).  Selling
  Shareholders may also sell such shares pursuant to Rule 144 or Rule 144A
  under the Securities Act of 1933 if the requirements for the availability
  of such rules have been satisfied. 
  
       The Selling Shareholders and any broker-dealers who act in
  connection with the sale of the Shares hereunder may be deemed to be
  "underwriters" within the meaning of Section 2(11) of the Securities Act,
  and any commissions received by them and profit on any resale of the
  Shares as principal might be deemed to be underwriting discounts and
  commissions under the Securities Act.  
  
  
  
  
  
                                                      PAGE 34
  
  
       The Company has advised the Selling Shareholders that they and any
  securities broker-dealers or others who may be deemed to be statutory
  underwriters will be subject to the Prospectus delivery requirements
  under the Securities Act of 1933.  The Company has also advised the
  Selling Shareholders that in the event of a "distribution" of his or its
  shares, such Selling Shareholders, any "affiliated purchasers," and any
  broker-dealer or other person who participates in such distribution may
  be subject to Rule 10b-6 under the Securities Exchange Act of 1934 ("1934
  Act") until his or its participation in that distribution is completed. 
  A "distribution" is defined in Rule 10b-6(c)(5) as an offering of
  securities "that is distinguished from ordinary trading transactions by
  the magnitude of the offering and the presence of special selling efforts
  and selling methods."  The Company has also advised the Selling
  Shareholders that Rule 10b-7 under the 1934 Act prohibits any
  "stabilizing bid" or "stabilizing purchase" for the purpose of pegging,
  fixing or stabilizing the price of the Common Stock in connection with
  this offering.
  
  
               DESCRIPTION OF COMMON STOCK AND PREFERRED STOCK
  
       The shares of Common Stock covered by this Prospectus are fully paid
  and nonassessable.  Holders of the Common Stock have no preemptive
  rights.  Each stockholder is entitled to one vote for each share of
  Common Stock held of record by such stockholder.  There is no right to
  cumulate votes for election of directors.  Upon liquidation of the
  Company, the assets then legally available for distribution to holders of
  the Common Stock will be distributed ratably among such shareholders in
  proportion to their stock holdings.  Holders of Common Stock are entitled
  to dividends when, as and if declared by the Board of Directors out of
  funds legally available therefor.
  
       The authorized capital stock of the Company consists of 100,000,000
  shares of Common Stock, $.01 par value per share, and 1,000,000 shares of
  preferred stock, $10 par value per share.  A quorum for purposes of
  meetings of common shareholders consists of a majority of the issued and
  outstanding shares of Common Stock, and once a quorum is established,
  action of a routine nature may properly be taken by a majority of the
  shares represented in person or by proxy at the meeting.  Most major
  corporate transactions such as mergers, consolidations, sales of all or
  substantially all assets, and certain amendments to the articles of
  incorporation require approval by the holders of two-thirds of the issued
  and outstanding shares entitled to vote.  The Company's board of
  directors is authorized to issue shares of Common Stock and preferred
  stock without approval of shareholders.  Shares of preferred stock may be
  issued in one or more series, the terms of which will be determined at
  the time of issuance by the board of directors without any requirement
  for shareholder approval.  Such rights may include voting rights,
  preferences as to dividends, and upon liquidation, conversion and
  redemption rights, and mandatory redemption provisions pursuant to
  sinking funds or otherwise.  No shares of preferred stock are issued and
  outstanding as of this date, and the Company has no present plans to
  issue shares of preferred stock. 
  
  
  
  
  
                                                      PAGE 35
  
  
                                LEGAL OPINIONS
  
       Brega & Winters, P.C., 1700 Lincoln Street, Suite 2222, Denver,
  Colorado 80203 has rendered an opinion as to the legality of the Shares
  issued to the Selling Shareholders.  A lawyer associated with Brega &
  Winters P.C. beneficially owns 283,052 Shares of the Company's common
  stock.
  
  
                                   EXPERTS
  
       The financial statements incorporated in this prospectus by
  reference from the Company's Annual Report on Form 10-KSB/A for the
  twelve months ended September 30, 1997 and the nine-month period ended
  September 30, 1996 have been audited by BDO Seidman, LLP, independent
  certified public accountants, as stated in their report (which contained
  an explanatory paragraph relative to the going concern uncertainty),
  which is incorporated herein, and has been so incorporated in reliance
  upon such report given upon the authority of the firm as experts in
  accounting and auditing.
  
       NO DEALER, SALESMAN, OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE
  ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED
  IN THIS PROSPECTUS IN CONNECTION WITH THE OFFERING HEREIN CONTAINED AND,
  IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED
  UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR THE SELLING
  SHAREHOLDERS.  THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
  SOLICITATION OF AN OFFER TO BUY, THE SECURITIES OFFERED HEREBY IN ANY
  JURISDICTION TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE AN OFFER OR
  SOLICITATION.  NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE
  HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE AN IMPLICATION THAT
  THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE THE DATE
  HEREOF OR THAT ANY INFORMATION CONTAINED HEREIN IS CORRECT AS TO ANY OF
  THE TIME SUBSEQUENT TO ITS DATE.  HOWEVER, THE COMPANY HAS UNDERTAKEN TO
  AMEND THE REGISTRATION STATEMENT OF WHICH THIS PROSPECTUS IS A PART TO
  REFLECT ANY FACTS OR EVENTS ARISING AFTER THE EFFECTIVE DATE THEREOF
  WHICH INDIVIDUALLY OR IN THE AGGREGATE REPRESENT A FUNDAMENTAL CHANGE IN
  THE INFORMATION SET FORTH IN THE REGISTRATION STATEMENT.  IT IS
  ANTICIPATED, HOWEVER, THAT MOST UPDATED INFORMATION WILL BE INCORPORATED
  HEREIN BY REFERENCE TO THE COMPANY'S REPORTS FILED UNDER THE SECURITIES
  EXCHANGE ACT OF 1934.  SEE "DOCUMENTS INCORPORATED BY REFERENCE."
  
       ALL DEALERS EFFECTING TRANSACTIONS IN THE REGISTERED SECURITIES,
  WHETHER OR NOT PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO
  DELIVER A PROSPECTUS.  THIS IS IN ADDITION TO THE OBLIGATION OF DEALERS
  TO DELIVER A PROSPECTUS WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO
  THEIR UNSOLD ALLOTMENTS OR SUBSCRIPTIONS. 
  
  
  
  
  
  
  
  
  
  
  
  
                                                      PAGE 36
  
  
  
                              TABLE OF CONTENTS
                                                      
  Available Information                                   2
  
  Documents Incorporated by Reference                     2
  
  Summary                                                 2
  
  Risk Factors                                            4
  
  Use of Proceeds                                         9
  
  Recent Developments                                    10
  
  Selling Shareholders                                   10
  
  Plan of Distribution                                   12
  
  Description of Common Stock and Preferred Stock        13
  
  Legal Opinions                                         13
  
  Experts                                                13