UNION CARBIDE CORPORATION
                39 Old Ridgebury Road  Danbury, CT  06817-0001

D.B.  Jones          Phone:  (203)  794-3443



                             BUSINESS CONFIDENTIAL


                                                                 July 31, 1997


Mr.  Jerry  Richter
Penn  Octane  Corporation
900  Veterans  Boulevard,  Suite  240
Redwood  City,  CA  94063

Re:          Purchase  Agreement  0515-007182

Dear  Jerry,

Confirming  our  conversation  today, it is agreed that for deliveries by tank
trucks,  the price of propylene will be the US Gulf Coast Polymer Grade marker
price,  as  reported  by CMAI, less 2.0 cents per pound.  The discount will be
2.5  cents  per pound once shipments are made by rail cars, or as of September
15,  1997  which  ever  comes  first.

Please sign both originals of this letter and return one signed original to me
for  our  files.

                                   Very  truly  yours,


                                   D.B.  Jones

Agreed  to  by:

/s/ Jerry  Richter
- --------------------------------------  --------------------------------------
PENN  OCTANE  COMPANY                                        DATE

DBJ/lr


                           UNION CARBIDE CORPORATION

                              PURCHASE AGREEMENT


Sellers  Agreement  No.  UCC.#1          Union  Carbide  Corporation
                           Agreement No. 0515-007182

AGREEMENT made this 1st day of July, 1997 between UNION CARBIDE CORPORATION, a
New  York  corporation  (hereinafter called "UCC") and Penn Octane Corporation
(hereinafter called "SELLER") 900 Veterans Boulevard, Suite 240, Redwood City,
California  94063  a  Corporation.

SELLER  shall  sell  and deliver to UCC and UCC shall purchase from SELLER the
PRODUCT  described  below, upon the terms contained in the BOXES below, in the
GENERAL  PROVISIONS  hereinafter  set forth, and in each RIDER, if and, listed
below,  all  attached  hereto  and  made  a  part  hereof.

Fill  in  required  information  in appropriate BOXES.  If insufficient space,
attach  a  RIDER  containing  the  appropriate  information,  mark  it  with
identifying Number and Title and insert in the applicable BOX.  "See Rider No.
(insert  identifying  number)."



                       
A.  PRODUCT                  Propylene

B.  SPECIFICATIONS           See Rider No. 1

C.  PLACE OF DELIVERY        UCC's Plant at Texas City, Texas

D.  MEANS OF TRANSPORTATION  Rail Cars and Tank Trucks

E.  CONTAINERS               Tank Trucks and Rail Cars
                             SELLER is responsible for furnishing tank trucks
                             and rail cars that meet DOT requirements.

F.  DELIVERY PERIOD          August 1, 1997 through July 31, 1998 and
                             continuing thereafter unless terminated by either
                             party giving written notice not less than ninety
                             (90) days prior to the effective date of
                             termination.

G.  RATE OF DELIVERY         Nine (9) million pounds per month or as mutually
                             agreed by both parties.

H.  QUANTITY                 One hundred eight (108) Million Pounds

I.  PRICE                    The monthly price for Product will be the final
                             US Gulf Coast Polymer Grade contract marker
                             price for such month as reported in the CMAI
                             Monomers Market Report less 2.5 cents per
                             pound.

                             For reference, the final US Gulf Coast Polymer
                             Grade market price for product in June 1997 was
                             21.25 cents per pound and the monthly price
                             would have been 18.75 cents per pound.

J.  INVOICES AND TERMS OF
    PAYMENT                  INVOICE PAYMENT TERMS:
                             NET TEN (10) DAYS from receipt of invoice
                             and supporting documentation.

                             Payment will be by wire transfer:
                             PENN OCTANE CORPORATION
                             c/o Bay Area Bank
                             Account No. 04479601
                             ABA No. 121137661

                             SEND INVOICES TO:

                             UNION CARBIDE CORPORATION
                             Attn:  Dawna Kessler
                             Building 2000, Room 1414
                             P.O. Box 8361
                             South Charleston, WV 25303

                             Please refer to UCC's Agreement Number 0515--
                             007182 on all invoices and supporting
                             documentation.

K.  QUANTITY AND QUALITY
    DETERMINATION            UCC's truck or rail scale tickets for Tank Trucks
                             or Rail Cars.

L.  FREIGHT CHARGES          Account of SELLER

M.  COMMUNICATIONS ADDRESS   UNION CARBIDE CORPORATION
                             39 Old Ridgebury Road
                             Danbury, CT 06817-0001
                             ATTN: D.B. Jones - Olefins Supply and Product Manager

                             SELLER'S Address:

                             PENN OCTANE CORPORATION
                             900 Veterans Boulevard, Suite 240
                             Redwood City, CA 94063
                             Attn: J. Richter




PENN  OCTANE  CORPORATION                            UNION CARBIDE CORPORATION
(Name  of  SELLER)


By: /s/ J. Richter                   By: /s/ D.B.  Jones
   ----------------------------------   --------------------------------------
                                        D.B.  Jones

TITLE: President                     TITLE: Olefins Supply and Product Manager
                                     PLACE OF SIGNING:  Danbury, CT

LIST  OF  RIDERS

RIDER  NO.          TITLE  OF  RIDER
1                   Refinery  Grade  Propylene  Specifications


GENERAL  PROVISIONS                                  UNION CARBIDE CORPORATION
                                                     AGREEMENT NO. 0515-007182

SECTION  1.          PRICE
     Except  as  set  forth  in  this Agreement or as otherwise agreed upon in
writing by the parties hereto, all prices specified in this Agreement are firm
and  are  not  subject to adjustment except as set forth in Rider No. 3 and no
charge  shall  made  by  SELLER  to  UCC for any CONTAINERS or other packaging
materials  or  services  furnished  by  SELLER  in  connection  with  PRODUCT.

SECTION  2.          INVOICES  AND  PAYMENT  TERMS
     Unless  otherwise  specified  in  the BOX entitled "INVOICES AND TERMS OF
PAYMENT",  an  invoice  shall  be  rendered  by  SELLER  to UCC at the address
specified  for  such  purposes in said BOX within a reasonable time after each
delivery  made hereunder and setting forth the quantity of PRODUCT included in
such  delivery  and  the  amount  due hereunder for such quantity, and payment
shall  be  made by UCC to SELLER at the address specified for such purposes in
said  invoice  for  the  correct  amount  of  such  invoice  so  rendered.

SECTION  3.          TAXES
     Except  as provided in Section 4 with respect to Sales and Use Taxes, and
except  as  otherwise  agreed  in  writing  by UCC and SELLER, SELLER shall be
liable  for  all  taxes,  excises,  and  other  governmental charges which are
enacted  prior  to  the  date  of  this  Agreement  and required to be paid or
collected  by  SELLER under any federal, state or other law, applicable to the
production, processing,l severance, transportation, storage or delivery of any
or  all  PRODUCT  hereunder,  or  to  income, profits, or receipts received by
SELLER  for  such  PRODUCT.

SECTION  4.          RELEASES
     UCC  shall issue written releases to SELLER covering all deliveries to be
made  by  SELLER  hereunder,r  in  no  event  shall  SELLER  make any delivery
hereunder  until  after  its  receipt  of the authorized release issued by UCC
covering  such  delivery.  UCC shall notify SELLER in writing of the person or
persons  authorized to issue such releases.  Each such release shall set forth
the  following:  A  statement  identifying such release to this Agreement, the
number by which such release shall be identified; a description for PRODUCT to
be  shipped,  the  quantity  of  PRODUCT  to  be  delivered;  the  means  of
transportation  and  name  of carrier, a description of container; the date of
delivery,  the  place  of  delivery,  the  Sales  and/or Use Tax Status of the
quantity of PRODUCT to be delivered; and invoicing instructions.  In case of a
conflict between any of the terms of any such release and any of the terms set
forth  in  the  BOXES,  GENERAL  PROVISION  or  RIDERS, the former terms shall
control.    There  shall  be  no  limitation  on the number of releases issued
hereunder.

SECTION  5.          DELIVERIES
     Where  the  PLACE OF DELIVERY of PRODUCT is the place of shipment, SELLER
shall,  at  its own expense, provide, maintain and operate suitable facilities
for  making  deliveries  of  such  PRODUCT,  and when the PLACE OF DELIVERY of
PRODUCT  is  the place of destination, UCC shall, at its own expense, provide,
maintain  and  operate  suitable  facilities  for receiving deliveries of such
PRODUCT;  provided,  however,  that,  except  as  hereinafter provided in this
SECTION,  all  loading  and unloading equipment customarily furnished with the
CONTAINERS  shall  be  provided,  maintained  and operated by the party hereto
responsible  for  furnishing such CONTAINERS.  Unless otherwise agreed upon in
writing  by the parties hereto, SELLER shall perform all loading functions, at
its  own  expense,  and UCC shall perform all unloading functions,l at its own
expense.    Deliveries shall be made at the applicable RATE OF DELIVERY and at
the  applicable PLACE OF DELIVERY; provided, however, that the particular time
and  quantity  of each delivery shall be specified UCC to SELLER reasonably in
advance  of  such  delivery, together with all necessary shipping instructions
for  such  delivery  which  are  not  set  forth  in  the  BOXES.

SECTION  6.          TRANSPORTATION,  CONTAINERS
     When the PLACE OF DELIVERY of PRODUCT is the place of shipment, UCC shall
either  transport  such PRODUCT from such place or cause a carrier or carriers
to  transport  such  PRODUCT from such place; and if such transportation is by
means  of  ship or barge, such ship or barge shall also be furnished by UCC or
such  carrier  or  carriers  shall  either be named by UCC in the BOX entitled
"MEANS  OF  TRANSPORTATION"  or  by  UCC  at  a later date.  When the PLACE OF
DELIVERY  of PRODUCT is the place of destination SELLER shall either transport
such  PRODUCT  to destination or cause a carrier or carriers to transport such
PRODUCT to such destination; and if such transportation is by means of ship or
barge, such ship or barge shall also be furnished by SELLER or such carrier or
carriers.  Such carrier or carriers shall either be named by SELLER in the BOX
entitled  "MEANS OF TRANSPORTATION" or by SELLER at a later date.  When hopper
cars,  tank  cars or other rail cars are furnished by SELLER as CONTAINERS for
making  any  shipment  hereunder and such hopper cars, tank cars or other rail
cars are not supplied by a common carrier, then such hopper cars, tank cars or
other  rail  cars shall be trip leased by SELLER to UCC.  Upon mutually agreed
terms  and  conditions.

SECTION  7.          TITLE  AND  RISK  OF  LOSS
     Title  to, and risk of loss of, PRODUCT delivered hereunder shall pass at
the  following  applicable  points:
     (a)          when the PLACE OF DELIVERY is the place of shipment and such
PRODUCT  leaves  the place of shipment by ship or barge or truck, at the point
such PRODUCT enters such barge, ship or truck at the point such PRODUCT enters
such  barge,  s  hip  or  truck, or if prior to entering such ship or barge or
truck  such  PRODUCT enters the loading equipment furnished by and attached or
affixed  to such ship or barge or truck, then at the point such PRODUCT enters
such  loading  equipment;
     (b)          when the PLACE OF DELIVERY is the place of shipment and such
PRODUCT  leaves  the place of shipment by rail, at the point where the carrier
accepts  the  shipment;
     (c)       when the PLACE OF DELIVERY is the place of destination and such
PRODUCT  arrives at the place of destination by barge or ship or truck, at the
point  such  barge, ship or truck is ready for unloading facilities designated
by  UCC  for  unloading;
     (d)       when the PLACE OF DELIVERY is the place of destination and such
PRODUCT  arrives  at  the place of destination by rail, at the point where the
shipment  is  delivered  by  the  carrier  to  UCC.

SECTION  8.          QUANTITY  AND  QUALITY  DETERMINATION
     The  quantity  of  PRODUCT  delivered  to  SELLER  shall be determined in
accordance with the method specified in the BOX entitled "QUANTITY AND QUALITY
DETERMINATION,"  or if a method is not specified, in accordance with customary
industry  procedures.    The  quality  of PRODUCT delivered hereunder shall be
determined  in  accordance  with  the  method  specified  in  the BOX entitled
'QUANTITY  AND  QUALITY DETERMINATION," or if a method is not so specified, by
sampling  and  analysis  in accordance with customary industry procedures.  In
the  event  and to the extent it is not specified in the BOX entitled "QUALITY
AND  QUALITY  DETERMINATION" that the quantity and/or quality determination of
PRODUCT  delivered  is  to be made by an independent Party, such determination
shall  be made by SELLER in accordance with the applicable method or procedure
provided  for  in this Section, and shall be final and binding with respect to
such  PRODUCT  so  delivered unless proven to be in error.  Promptly following
each  delivery of PRODUCT hereunder, SELLER shall give a written report to UCC
setting  forth  the  quantity  and  quality  determination  of  the PRODUCT so
delivered.    In  the  event it is specified in the BOX entitled "QUANTITY AND
QUALITY  DETERMINATION"  that  the  quantity  and/or  quality determination of
PRODUCT  delivered  hereunder  is  to  be made by an independent Party, SELLER
shall  make  all  necessary arrangements with such independent Party and shall
require  that  such  determination   be made in accordance with the applicable
method  and  procedures  described  above  and  that  a written report of such
quantity  and/or  determination  shall  be  promptly given by such independent
Party  to  each party hereto at the applicable address provided for in Section
15  of these GENERAL PROVISIONS.  The quantity and/or quality determination of
such  Independent  Party,  as  set  forth  in  such report, shall be final and
binding  with  respect to such PRODUCT so delivered, and the expense of hiring
such  independent  Party shall be shared equally by the parties hereto, unless
otherwise  specified  in  said BOX.  If an independent Party is specified, but
not  named,  in  said  BOX,  Seller  shall  select  such  Independent  Party.

SECTION  9.          FORCE  MAJEURE
     Neither party shall be liable for its failure to perform hereunder due to
any  occurrence  beyond  its  reasonable control, including but not limited to
Seller's  failure  to perform as a result of its failure to produce, transport
or  deliver  PRODUCT due to any such occurrence, or Buyer's failure to perform
as  a  result  of  its  failure  to  use  or  consume  PRODUCT due to any such
occurrence.    The  aforesaid  occurrences  shall  include acts of God, fires,
floods,l  wars, sabotage, accidents, labor disputes or shortages, governmental
laws,  ordinances, rules and regulations,l whether valid or invalid (including
but  not  limited  to  priorities,  requisitions,  allocations,l  and  price
adjustment  restrictions),  inability  to  obtain  material,  equipment  or
transportation,a  nd  any  other similar or different occurrence.  The failing
party  shall  notify  the  other  party  thereof  in  writing  as  soon as its
reasonably  possible  after the commencement of such occurrence, setting forth
the  full  particulars  in  connection therewith, shall remedy such occurrence
with  all  reasonable  dispatch, and shall promptly give written notice to the
other  party  of  the  cessation  of such occurrence.  Any delivery of PRODUCT
omitted  at  the  time  or  times  required for such delivery hereunder due to
either  party's  failure  to perform its obligations hereunder due to any such
occurrence  shall  be  omitted from this Agreement and the DELIVERY PERIOD for
such PRODUCT shall not be extended.  If, due to any such occurrence, SELLER is
unable  to make any delivery or deliveries at the time or times required under
this  Agreement,  SELLER shall have the right to allocate its available supply
among  its customers and its departments and divisions in a fair and equitable
manner.  In no event shall SELLER be obligated to purchase PRODUCT from others
in  order  to  enable  it  to  deliver  product  to  UCC  hereunder.

SECTION  10.          WARRANTIES
     SELLER  warrants  that  PRODUCT  delivered  by  it  hereunder  meets  the
specifications  for such PRODUCT hereunder and that such PRODUCT is adequately
contained,  packages and labeled and conforms to the promises and affirmations
of  fact  made  on  the CONTAINER and label.  NO WARRANTIES, INCLUDING BUT NOT
LIMITED  WARRANTY  OF MERCHANTABILITY AND WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE  SHALL  BE  IMPLIED.

SECTION  11.          CHANGES
     Should  SELLER  contemplate  as to PRODUCT any change in (i) formulation,
(ii) specifications or test methods, (iii) manufacturing or production methods
or processes, and/or (iv) raw materials or their source, SELLER shall promptly
notify  UCC  in  writing  prior to implementing any such change, setting forth
sufficient  information as to the nature of the change and SELLER'S assessment
of  (a)  the impact of such change on PRODUCT, and (b) if known to SELLER, the
impact  of  such  change  on  the  use  or uses for PRODUCT.  SELLER shall not
implement  such  change  with  respect  to  PRODUCT  to be delivered hereunder
without  UCC's  prior  written  approval.   Should SELLER proceed without such
approval, UCC may suspend further purchases and terminate this Agreement as to
such  PRODUCT  without  prejudice  to  UCC's  exercise of any other rights and
remedies it may have against SELLER.  SELLER shall indemnify and hold UCC, its
successors and assigns, harmless from any and all claims, losses, liabilities,
damages  and  expenses  of  every  character  whatsoever  arising out of or in
connection  with  any unapproved change affecting PRODUCT delivered hereunder.

SECTION  12.          PATENT  INDEMNITY
     Except  as  hereinafter  limited,  SELLER shall protect and indemnify UCC
from  and  against  any  and all claims, damages, judgments, expenses and loss
arising  from infringement or alleged infringement of any patent of the United
States  by  any of the PRODUCT delivered hereunder, and SELLER shall defend or
settle,  at  its  own  expense, any suit or proceeding brought against UCC for
such infringement; provided that SELLER is notified promptly in writing of the
commencement  of  such  suit or proceeding and is given authority, information
and  assistance  by  UCC  for  the  defense or settlement thereof; and provide
further  that  UCC  shall not settle or compromise any such suit or proceeding
without  the  prior written consent of SELLER.  Furthermore, in the event that
UCC  should  be  enjoined  in  such  suit  or proceeding from suing any of the
PRODUCT delivered hereunder.  SELLER, at its option, shall promptly either (i)
secure  liability,  (ii)  replace  said  PRODUCT with noninfringing PRODUCT or
modify  same  to  become  noninfringing,  all at SELLER'S expense and to UCC's
satisfaction,  or  (iii) remove said PRODUCT at SELLER'S expense and refund to
UCC  the  amount  paid  to  SELLER therefore.  The provisions of this Section,
however,  shall not apply to the use of any of the PRODUCT delivered hereunder
in  combination  with other materials or in the practice of any process, or to
infringement  by  reason  of  such  use.

SECTION  13.          CLAIMS
     Receipt by UCC of any PRODUCT delivered hereunder shall be an unqualified
acceptance of,a nd a waiver by UCC of any and all claims with respect to, such
PRODUCT,  unless  UCC  gives SELLER written notice of claim within thirty (30)
days  after  (a) the date of such PRODUCT arrives at the destination specified
by  UCC  to  SELLER  in the shipping instructions for such PRODUCT; or (b) the
earliest  date  on  which  the  basis  for  such  claim  becomes  reasonably
discoverable  by  UCC,  whichever date is the later.  UCC assumes all risk and
liability  for  the  results obtained by the use in manufacturing processes of
UCC  or in combination with other substances or any product which is delivered
to  it  hereunder and which meets the specifications of such PRODUCT contained
in or referred to in this Agreement.  In no event shall either party be liable
for  special  ,  indirect  or  consequential  damages.

SECTION  14.          FAIR  LABOR  STANDARDS  ACT
     SELLER agrees that all Product delivered by it hereunder will be produced
in  compliance with the Fair Labor Standards Act, as amended, and agrees to so
certify  on  its invoices if so directed by a stamp placed on the face of this
Agreement.

SECTION  15.          NOTICES
     Any notice, request, report, statement or other communication to be given
in  writing  under this Agreement shall be deemed to have been given by either
party  to  the  other  party:
     (a)          upon  the date of the mailing thereof to such other party by
registered  or  certified  mail,  as  shown on the Post Office receipt, at the
applicable  address  set forth in the BOX entitled "COMMUNICATIONS ADDRESS" or
at  such  other  address  as such other party may specify from time to time in
writing;
     (b)       if not so mailed by registered or certified mail, upon the date
of  the  receipt  thereof  such  other  party.

SECTION  16.          MISCELLANEOUS
     No  modification  of,  addition to, or waiver of any of the terms of this
Agreement  (a) shall be binding upon either party unless in writing and signed
by an authorized representative of such party; or (b) shall be effected by the
acknowledgement  or  acceptance  of  purchase  order or other forms containing
additional  or  different  terms  of  conditions,  whether or not signed by an
authorized  representative  of  such  party.  No waiver by either party of any
breach  by  the  other  party  of  any of the terms of this Agreement shall be
construed  as  a  waiver of any subsequent breach, whether of the same or of a
different  term of this Agreement.  Any assignment of this Agreement by SELLER
without  the  written  consent  of  UCC  shall  be  void.    THE  VALIDITY,
INTERPRETATION  AND PERFORMANCE OF THIS AGREEMENT SHALL BE GOVERNED BY THE LAW
OF  THE  STATE  OF  TEXAS, WITHOUT REFERENCE TO ITS PRINCIPLES OF CONFLICTS OF
LAW.  The rights and remedies of the parties set forth in this Agreement shall
not  be  exclusive and are in addition to all other rights and remedies of the
parties  hereto.    This Agreement sets forth the entire agreement between the
parties  hereto  with  respect  to  the  subject  matter of this Agreement and
supersedes  all  prior  understandings,  negotiations and dealings between the
parties  hereto  with  respect  to  such  subject  matter.   Neither course of
performance,  nor  course  of  dealing,  nor  usage  of trade shall be used to
qualify,  explain  or  supplement  any  of  the  terms  of  this  Agreement.



                                                     UNION CARBIDE CORPORATION
                                                     AGREEMENT NO. 0515-007182
                                                                   -----------




                                    RIDER NO. 1
                              POLYMER GRADE PROPYLENE
                                   SPECIFICATION



 REQUIREMENTS                                 LIMITS                     METHOD
- ----------------------------  ---------------------------------------  -----------
                                                                 
1. Propylene                  98% by volume, min. Equivalent to 98%    1B-1C2-1.22
                              by weight, min.
2. Sulfur                     3 ppm by weight, max.                    1B-1C2-1.22
3. Total C4's                 1100 ppm by volume, max. Equivalent to   1B-1C2-1.22
                              1400 ppm by weight, max.
4. Methylacetylene (propyne)  200 ppm by volume, max. Equivalent to    1B-1C2-1.22
   and propadienc (allene)    190 ppm by weight, max.
5. Ethylene                   1000 ppm by volume, max. Equivalent to   1B-1C2-1.22
                              650 ppm by weight, max.






                        SUPPLEMENTAL QUALITY DESCRIPTIONS

      The Supplier guarantees that this product also meets the following, but
          analytical data is not required on the product quality report.

                                                                
6. Acetylene                 60 ppm by volume, max. Equivalent to 40  1B-1C2-1.22
                             ppm by weight, max.
7. Chlorides                 10 ppm by weight, max.                   1B-1C2-1.22
8. Methane plus ethane plus  2% by volume, max. Equivalent to 2% by   1B-1C2-1.22
   propane                   weight, max.
9. Butadiene                 100 ppm by volume, max. Equivalent to    1B-1C2-1.22
                             130 ppm by weight, max.