Exhibit 99.1

                Kerr-McGee Chemical Announces Plans to Shut Down
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              Sulfate Pigment Production at Georgia, U.S. Facility
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                Georgia Chloride Facility to Continue Operations
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     Oklahoma  City,  Sept.  15, 2004 - Kerr-McGee  Chemical LLC, a wholly owned
affiliate of Kerr-McGee  Corp.  (NYSE:  KMG),  announces  plans to shut down its
titanium dioxide pigment sulfate production at the Savannah, Ga., U.S. facility,
by the end of September 2004.  Kerr-McGee Chemical is the world's  third-largest
producer and marketer of titanium  dioxide  pigment,  an inorganic  whitener and
opacifier for paints,  plastics,  paper, inks and hundreds of consumer products.
The Savannah sulfate production  accounted for approximately 4% of the company's
total  worldwide  pigment  production  in the first  half of 2004.  The  company
expects  this  decision to result in an  improvement  in  Kerr-McGee  Chemical's
operating profit of approximately $15 million annually.
     "Production  of  titanium  dioxide  pigment  remains  a core  business  for
Kerr-McGee,  and the  Savannah  chloride  facility is an  important  part of our
global  operations  and will continue  operations,"  said Tom Adams,  Kerr-McGee
Chemical vice president and general manager of the Pigment  Division.  "However,
demand  and prices  for  sulfate  anatase  pigments,  particularly  in the paper
market,  has  declined in North  America  consistently  during the past  several
years.  The  decreasing  volumes,  along with  unanticipated  environmental  and
infrastructure  issues discovered when Kerr-McGee acquired the facility in 2000,
contributed to the decision.  These combined  factors have created  unacceptable
financial  returns for the Savannah sulfate  facility.  Therefore,  we will shut
down all sulfate production at our Savannah facility."
     Titanium  dioxide pigment is produced  through either a chloride or sulfate
process.  Chloride-process  pigment accounts for  approximately 60% of worldwide
consumption  and is used in the  manufacture  of  coatings,  plastics  and other
everyday consumer products.  Sulfate-process  grades are used in the manufacture
of paper, plastics and specialty products such as catalysts, cosmetics, food and
pharmaceuticals.
     "Growth in the pigment  industry is in the  chloride-process  grades,  with
sulfate-process  grades fulfilling  specialty  needs," Adams explained.  "We are
focused on  leveraging  our  expertise and  proprietary  chloride  technology to
increase  margins  worldwide  and  enhance  the  profitability  of our  chemical
business."
     The company also plans to end production at the Savannah  gypsum plant that
uses by-product from the sulfate process to manufacture gypsum.  Kerr-McGee will
continue sales and service of gypsum with current inventory.
     Kerr-McGee expects to take an after-tax special charge of approximately $75
million to $85 million in the third  quarter of 2004,  primarily  related to the
shutdowns.
     The Savannah  facility's  workforce of 410 will be reduced by approximately
100  positions.  In addition,  the facility will  decrease its daily  contractor
workforce by approximately 40 positions.
     "Kerr-McGee's  sulfate  strategy now centers around the Uerdingen,  Germany
plant,  which has the ability to make a variety of grades for different  sulfate
applications," Adams said.
     Kerr-McGee   expects  to  fill  North   American   sulfate  paper  customer
commitments  with its  current  inventory.  After  the  inventory  is  depleted,
Kerr-McGee will no longer provide  sulfate-process pigment to the North American
paper  market.   The  company  will  continue  to  serve  other  global  sulfate
requirements  from its Uerdingen plant,  which has an annual capacity of 107,000
tonnes.

Provision for Noncash Environmental Charges
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     Kerr-McGee Corp. announced that the company expects to record environmental
noncash  provisions of  approximately  $45 million to $50 million after taxes in
the third quarter of 2004, for  remediation of former sites.  The  environmental
provision incorporates new information into the company's analysis and review of
environmental  remediation projects. These costs relate to activities at various
sites of former  operations,  including a closed  chemical site in West Chicago,
Ill.,  an oil and gas  field  in Los  Angeles  County  and two  former  refining
operations in Oklahoma.
     Kerr-McGee Corp. is an Oklahoma  City-based  energy and inorganic  chemical
company with worldwide operations and assets of more than $14 billion.

                                      # # #

Statements  in  this  news  release  regarding  the  company's  or  management's
intentions,  beliefs or expectations,  or that otherwise speak to future events,
including  higher  margins,  production  expectations  and future  increases  in
profitability,  are "forward-looking  statements" within the meaning of the U.S.
Private  Securities   Litigation  Reform  Act  of  1995.  These  forward-looking
statements  include those statements  preceded by, followed by or that otherwise
include  the word  "plans,"  "expects"  or similar  words.  Future  results  and
developments  discussed in these  statements may be affected by numerous factors
and risks, such as the accuracy of the assumptions that underlie the statements,
the price of titanium dioxide pigment and other chemical products, uncertainties
in  interpreting  engineering  data,  demand  for  consumer  products  for which
Kerr-McGee's  chemical businesses supply raw materials,  the financial resources
of  competitors,  changes  in laws and  regulations,  the  ability to respond to
challenges in  international  markets  (including  changes in currency  exchange
rates),  political or economic  conditions in areas where  Kerr-McGee  operates,
trade and regulatory matters, general economic conditions, and other factors and
risks  identified in the Risk Factors section of the company's  Annual Report on
Form 10-K and other U.S.  Securities  and Exchange  Commission  filings.  Actual
results and developments  may differ  materially from those expressed or implied
in this news release.

Media Contacts:   Debbie Schramm                     John Christiansen
                  Direct: 405-270-2877               Direct: 405-270-3995
                  Pager: 1-888-734-8294              Cell:  405-406-6574
                  dschramm@kmg.com                   jchristiansen@kmg.com


Investor Contact: Rick Buterbaugh
                  Direct: 405-270-3561