6-K UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER
                      PURSUANT TO RULE 13a-16 OR 15d-16 OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                                  May 24, 2006

                             BASF AKTIENGESELLSCHAFT
             (Exact name of Registrant as Specified in its Charter)

                                BASF CORPORATION
                 (Translation of Registrant's name into English)

               Carl Bosch Strasse 38, LUDWIGSHAFEN, GERMANY 67056
                    (Address of Principal Executive Offices)

     Indicate by check mark whether the Registrant files or will file annual
                   reports under cover Form 20-F or Form 40-F
                              Form 20-F X Form 40-F


   Indicate by check mark whether the Registrant by furnishing the information
    contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
                                    Yes No X


       If "Yes" is marked, indicate below the file number assigned to the
               Registrant in connection with Rule 12g3-2(b): 82- .



BASF writes to Engelhard's shareholders

Ludwigshafen,  Germany, May 23, 2006 - BASF Aktiengesellschaft  (Frankfurt: BAS,
NYSE:  BF [ADR],  LSE: BFA,  SWX: AN) today  announced  that it sent a letter to
Engelhard's shareholders.

The letter is available for download on the Internet at:

corporate.basf.com/shareholdersletter_engelhard (English)
corporate.basf.com/aktionaersbrief_engelhard (German)

BASF  is the  world's  leading  chemical  company:  The  Chemical  Company.  Its
portfolio ranges from chemicals,  plastics,  performance products,  agricultural
products and fine chemicals to crude oil and natural gas. As a reliable  partner
to virtually all industries,  BASF's intelligent system solutions and high-value
products  help  its  customers  to  be  more   successful.   BASF  develops  new
technologies  and  uses  them to open up  additional  market  opportunities.  It
combines   economic   success   with   environmental   protection   and   social
responsibility,  thus  contributing  to a  better  future.  In  2005,  BASF  had
approximately 81,000 employees and posted sales of more than (euro)42.7 billion.
BASF shares are traded on the stock exchanges in Frankfurt (BAS),  London (BFA),
New York (BF) and Zurich (AN).  Further  information on BASF is available on the
Internet at www.basf.com.



BASF is currently  soliciting proxies for use at Engelhard's 2006 annual meeting
of stockholders, or at any adjournment or postponement thereof, to vote in favor
of BASF's nominees  identified in the definitive proxy statement on Schedule 14A
filed with the U.S.  Securities and Exchange  Commission  (the "SEC") on May 12,
2006,  and to vote on any other matters that shall be voted upon at  Engelhard's
2006 annual meeting of  stockholders.  All Engelhard  stockholders  are strongly
encouraged to read the definitive proxy statement, because it contains important
information.  Engelhard  stockholders  may obtain copies of the definitive proxy
statement and related materials for free at the SEC's website at www.sec.gov.

The identity of people who may be considered "participants in a solicitation" of
proxies from Engelhard  stockholders  for use at Engelhard's 2006 annual meeting
of  stockholders  under SEC rules and a description of their direct and indirect
interests in the solicitation,  by security holdings or otherwise, are contained
in the definitive  proxy  statement on Schedule 14A that BASF filed with the SEC
on May 12, 2006.

BASF may also solicit  written  consents of Engelhard  stockholders to (a) amend
the bylaws of Engelhard to increase the number of directors on Engelhard's Board
of  Directors  to  twelve  and  provide  that any  newly  created  vacancies  on
Engelhard's Board of Directors shall be filled by Engelhard's stockholders,  and
(b) to  appoint  individuals  selected  by BASF to fill  the  vacancies  created
thereby (the  "Proposals").  Full details of the  Proposals are contained in the
preliminary consent solicitation  statement on Schedule 14A that BASF filed with
the SEC May 15, 2006. All Engelhard stockholders are strongly encouraged to read
the preliminary consent statement and the definitive consent statement when they
are  available  because  they  will  contain  important  information.  Engelhard
stockholders may obtain copies of the preliminary  consent statement and related
materials for free at the SEC's website at  www.sec.gov.  The identity of people
who, under SEC rules,  may be considered  "participants  in a  solicitation"  of
consents  for the  Proposals  and a  description  of their  direct and  indirect
interests in the solicitation,  by security holdings or otherwise, are contained
in the preliminary  consent  statement on Schedule 14A filed with the SEC on May
15, 2005.

This press release is provided for informational purposes only and is neither an
offer to  purchase  nor a  solicitation  of an offer to sell any  securities  of
Engelhard Corporation.  Any offers to purchase or solicitation of offers to sell
will be made only pursuant to the tender offer statement (including the offer to
purchase,  the  letter of  transmittal  and  other  offer  documents)  which was
initially  filed with the SEC on January 9,  2006.  Engelhard  stockholders  are
advised to read these documents and any other  documents  relating to the tender
offer that are filed with the SEC carefully and in their  entirety  because they
contain important information. Engelhard stockholders may obtain copies of these
documents for free at the SEC's website at www.sec.gov  or by calling  Innisfree
M&A Incorporated,  the Information Agent for the offer, at +1 877 750 5837 (Toll
Free from the U.S. and Canada) or 00800 7710 9971 (Toll Free from Europe).

This press release contains forward-looking statements. All statements contained
in this  press  release  that  are not  clearly  historical  in  nature  or that
necessarily  depend  on  future  events  are  forward-looking,   and  the  words
"anticipate,"  "believe," "expect,"  "estimate," "plan," and similar expressions
are generally intended to identify forward-looking statements.  These statements
are based on current expectations,  estimates and projections of BASF management
and  currently  available  information.   They  are  not  guarantees  of  future
performance,  involve  certain  risks and  uncertainties  that are  difficult to
predict and are based upon assumptions as to future events that may not prove to
be accurate.

Many factors could cause the actual results, performance or achievements of BASF
to be materially  different  from those that may be expressed or implied by such
statements. Such factors include those discussed in BASF's most recent Form 20-F
filed with the SEC.



Daniel Smith
Phone:     +49 621 60 20829
Fax:       +49 621 60 92693
daniel.smith@basf.com

US media contact:
Rand Pearsall
Phone:     +1 973 245 6820
Fax:       +1 973 245 6714
rand.pearsall@basf.com

Analysts/Investors contact:
Thilo Bischoff
Phone:     +49 621 60 21843
Fax:       +49 621 60 22500
Thilo.bischoff@basf.com




                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this Current Report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                BASF Aktiengesellschaft


May 24, 2006                    By: /s/ Elisabeth Schick
                                ------------------------------------
                                Name: Elisabeth Schick
                                Title: Director Site Communications Ludwigshafen
                                and Europe


                                By: /s/ Christian Schubert
                                ------------------------------------
                                Name: Christian Schubert
                                Title: Director Corporate Communications
                                BASF Group