Exhibit 4

     AGREEMENT OF  RESIGNATION,  APPOINTMENT  AND  ACCEPTANCE,  dated as of
November 30, 2006 by and among ASHLAND INC., a corporation  duly  organized
and  existing  under the laws of  Commonwealth  of Kentucky  and having its
principal  office at 50 E.  RiverCenter  Blvd.,  P.O.  Box 391,  Covington,
Kentucky  41012  (the  "Company"),  WILMINGTON  TRUST  COMPANY,  a Delaware
banking  corporation having its principal corporate trust office at 1100 N.
Market  Street,  Wilmington,   Delaware  19890  ("Successor  Trustee")  and
CITIBANK,  N.A., a national banking association duly organized and existing
under the laws of the  United  States of America  and having its  principal
corporate  trust office at 388 Greenwich  Street,  New York, New York 10013
("Resigning Trustee").

                                 RECITALS:

     WHEREAS, there are currently $20,136,000 aggregate principal amount of
the  Company's  8.80%  Sinking  Fund  Debentures  due 2012  and  $8,000,000
aggregate  principal amount of the Company's  Medium-Term  Notes,  Series E
(collectively,  the  "Securities")  outstanding  under  the  Amendment  and
Restatement  as of August 15, 1990 of the Indenture  dated as of August 15,
1989,  by and between the Company and  Resigning  Trustee as amended by the
First  Supplemental  Indenture  dated  as of  June  15,  2005,  the  Second
Supplemental Indenture dated as of June 30, 2005 and the Third Supplemental
Indenture  dated  as  of  June  30,  2005  (collectively  hereinafter,  the
"Indenture," unless context clearly indicates otherwise).

     WHEREAS,  the  Company  appointed  Resigning  Trustee as the  Trustee,
Security Registrar and Paying Agent under the Indenture;

     WHEREAS,  Section 6.10 of the Indenture  provides that the Trustee may
at any time resign with respect to the  Securities of one or more series by
giving  written notice of such  resignation to the Company,  effective upon
the  acceptance by a successor  Trustee of its  appointment  as a successor
Trustee;

     WHEREAS,  Section 6.10 of the Indenture  provides that, if the Trustee
shall resign, the Company shall promptly appoint a successor Trustee;



     WHEREAS,  Section 6.11 of the  Indenture  provides  that any successor
Trustee   appointed  in  accordance   with  the  Indenture  shall  execute,
acknowledge  and deliver to the Company and to its  predecessor  trustee an
instrument  accepting such appointment  under the Indenture,  and thereupon
the resignation of the predecessor  Trustee shall become effective and such
successor  Trustee,  without any further  act,  deed or  conveyance,  shall
become  vested  with all  rights,  powers,  duties and  obligations  of the
predecessor trustee;

     WHEREAS,  the Company desires to appoint  Successor Trustee as Trustee
to succeed Resigning Trustee in such capacity under the Indenture; and

     WHEREAS,  Successor  Trustee is willing to accept such  appointment as
successor Trustee, under the Indenture;

     NOW, THEREFORE, the Company,  Resigning Trustee and Successor Trustee,
for and in  consideration  of the  premises  and of other good and valuable
consideration,   the   receipt   and   sufficiency   of  which  are  hereby
acknowledged, hereby consent and agree as follows:

                                     1

                           THE RESIGNING TRUSTEE
                           ---------------------

     1.1  Pursuant to Section 6.10 of the Indenture, Resigning  Trustee has
by letter  notified  the Company  that  Resigning  Trustee is  resigning as
Trustee  under  the  Indenture,  but will  retain  the  roles  of  Security
Registrar, Paying Agent and Authenticating Agent.

     1.2  Resigning  Trustee  hereby  represents  and warrants to Successor
Trustee that:

          (a)  No covenant or condition contained in the Indenture has been
               waived by  Resigning  Trustee or, to the best  knowledge  of
               responsible  officers of Resigning Trustee's corporate trust
               department,  by the Holders of the  percentage  in aggregate
               principal amount of the Securities required by the Indenture
               to effect any such waiver.

          (b)  There is no action,  suit or  proceeding  pending or, to the
               best   knowledge  of   responsible   officers  of  Resigning
               Trustee's  corporate trust  department,  threatened  against
               Resigning  Trustee  before  any  court  or any  governmental
               authority  arising out of any act or  omission of  Resigning
               Trustee as Trustee under the Indenture.



          (c)  As of  the  effective  date  of  this  Agreement,  Resigning
               Trustee will hold no moneys or property under the Indenture.

          (d)  Pursuant to Section 3.03 of the Indenture, Resigning Trustee
               has duly  authenticated  and  delivered the  Securities,  of
               which  $20,136,000  aggregate  principal amount of the 8.80%
               Sinking Fund  Debenture  due 2012 and  $8,000,000  aggregate
               principal  amount  of the  Medium-Term  Notes,  Series E are
               outstanding as of the effective date hereof.

          (e)  The  registers in which it has  registered  and  transferred
               registered  Securities  accurately  reflect  the  amount  of
               Securities  issued and  outstanding  and the amounts payable
               thereon.

          (f)  Each person who so  authenticated  the  Securities  was duly
               elected,  qualified  and acting as an officer or  authorized
               signatory of Resigning Trustee and empowered to authenticate
               the   Securities   at   the   respective   times   of   such
               authentication  and the  signature of such person or persons
               appearing on such  Securities is each such person's  genuine
               signature.

          (g)  This  Agreement  has  been  duly  authorized,  executed  and
               delivered on behalf of Resigning Trustee and constitutes its
               legal,   valid  and  binding   obligation,   enforceable  in
               accordance with its terms.

          (h)  To  the  best  knowledge  of  responsible  officers  of  the
               Resigning Trustee's corporate trust department, no event has
               occurred  and is  continuing  which is,  or after  notice or
               lapse  of time  would  become,  an Event  of  Default  under
               Section 5.01 of the Indenture.

     1.3 Resigning Trustee hereby assigns, transfers, delivers and confirms
to Successor Trustee all right,  title and interest of Resigning Trustee in
and to the trust under the Indenture and all the rights,  powers and trusts
of the Trustee  under the  Indenture.  Resigning  Trustee shall execute and
deliver  such  further  instruments  and  shall  do such  other  things  as
Successor Trustee may reasonably  require so as to more fully and certainly
vest and confirm in  Successor  Trustee  all the rights,  powers and trusts
hereby assigned, transferred,  delivered and confirmed to Successor Trustee
as Trustee.



     1.4 Resigning  Trustee shall  deliver to Successor  Trustee,  as of or
promptly  after the effective date hereof,  all of the documents  listed on
Exhibit A hereto.

                                     2

                                THE COMPANY
                                -----------

     2.1 The Company hereby accepts the resignation of Resigning Trustee as
Trustee under the Indenture.

     2.2  The  Company  hereby  certifies  that it has  authorized  certain
officers of the Company to: (a) accept Resigning  Trustee's  resignation as
Trustee under the Indenture; (b) appoint Successor Trustee as Trustee under
the  Indenture;  and (c)  execute  and deliver  such  agreements  and other
instruments  as may be necessary or desirable to effectuate  the succession
of Successor Trustee as Trustee under the Indenture.

     2.3 The Company hereby appoints Successor Trustee as Trustee under the
Indenture to succeed to, and hereby vests  Successor  Trustee with, all the
rights,  powers,  duties and  obligations  of Resigning  Trustee  under the
Indenture  with  like  effect  as if  originally  named as  Trustee  in the
Indenture.

     2.4 Promptly after the effective date of this  Agreement,  the Company
shall  cause a  notice,  substantially  in the form of  Exhibit  B  annexed
hereto,  to be sent to each Holder of the Securities in accordance with the
provisions of Section 6.10 of the Indenture.

     2.5  The Company hereby  represents and warrants to Resigning  Trustee
and Successor Trustee that:

          (a)  The Company is a corporation duly and validly  organized and
               existing  pursuant  to  the  laws  of  the  Commonwealth  of
               Kentucky.

          (b)  The  Indenture   was  validly  and  lawfully   executed  and
               delivered  by the Company and the  Securities  were  validly
               issued by the Company.

          (c)  The Company has  performed  or  fulfilled  prior to the date
               hereof,  and will  continue to perform and fulfill after the
               date hereof, each covenant, agreement, condition, obligation
               and responsibility under the Indenture.



          (d)  No event has occurred and is  continuing  which is, or after
               notice or lapse of time  would  become,  an Event of Default
               under Section 5.01 of the Indenture.

          (e)  No covenant or condition contained in the Indenture has been
               waived  by the  Company  or,  to the  best of the  Company's
               knowledge,   by  Holders  of  the  percentage  in  aggregate
               principal  amount of the  Securities  required to effect any
               such waiver.

          (f)  There is no action,  suit or  proceeding  pending or, to the
               best of the  Company's  knowledge,  threatened  against  the
               Company  before  any  court  or any  governmental  authority
               arising out of any act or omission of the Company  under the
               Indenture.

          (g)  This  Agreement  has  been  duly  authorized,  executed  and
               delivered  on  behalf of the  Company  and  constitutes  its
               legal,   valid  and  binding   obligation,   enforceable  in
               accordance with its terms.

          (h)  All  conditions  precedent  relating to the  appointment  of
               Wilmington  Trust  Company as  successor  Trustee  under the
               Indenture have been complied with by the Company.

                                     3

                           THE SUCCESSOR TRUSTEE
                           ---------------------

     3.1  Successor  Trustee  hereby  represents  and warrants to Resigning
Trustee and to the Company that:

          (a)  Successor  Trustee is not disqualified  under the provisions
               of Section  6.08 and is  eligible  under the  provisions  of
               Section 6.09 of the  Indenture  to act as Trustee  under the
               Indenture.

          (b)  This  Agreement  has  been  duly  authorized,  executed  and
               delivered on behalf of Successor Trustee and constitutes its
               legal,   valid  and  binding   obligation,   enforceable  in
               accordance with its terms.



     3.2  Successor  Trustee  hereby  accepts its  appointment as successor
Trustee  under the  Indenture  and accepts the rights,  powers,  duties and
obligations of Resigning  Trustee as Trustee under the Indenture,  upon the
terms and conditions  set forth therein,  with like effect as if originally
named as Trustee under the Indenture.

     3.3 References in the Indenture to "Principal Office" or other similar
terms shall be deemed to refer to the principal  corporate  trust office of
Successor  Trustee,  which is presently  located at 1100 N. Market  Street,
Wilmington, Delaware 19890.

                                     4

                               MISCELLANEOUS
                               -------------

     4.1  Except as  otherwise  expressly  provided  herein  or unless  the
context otherwise requires,  all terms used herein which are defined in the
Indenture shall have the meanings assigned to them in the Indenture.

     4.2 This  Agreement and the  resignation,  appointment  and acceptance
effected  hereby  shall be  effective  as of the  opening  of  business  on
November 30, 2006.

     4.3 Resigning  Trustee  hereby  acknowledges  payment or provision for
payment in full by the Company of compensation for all services rendered by
Resigning  Trustee in its  capacity as Trustee  under  Section  6.07 of the
Indenture  and  reimbursement  in  full  by the  Company  of the  expenses,
disbursements  and advances  incurred or made by  Resigning  Trustee in its
capacity as Trustee in accordance  with the  provisions  of the  Indenture.
Resigning  Trustee  acknowledges  that it relinquishes any lien it may have
upon all  property or funds held or  collected  by it to secure any amounts
due it pursuant to the  provisions of Section 6.07 of the  Indenture.  This
Agreement  does not  constitute  a waiver or  assignment  by the  Resigning
Trustee of any compensation,  reimbursement, expenses or indemnity to which
it is or may be entitled pursuant to the Indenture, nor does this Agreement
constitute  a waiver by the  Company of claims  against  Resigning  Trustee
arising  under  the  Indenture  on or prior to the date this  Agreement  is
executed of which the Company is not then aware.  The Company  acknowledges
its  obligation  set forth in Section  6.07 of the  Indenture  to indemnify
Resigning Trustee for, and to hold Resigning Trustee harmless against,  any
loss,  liability or expense incurred without negligence or bad faith on the
part of  Resigning  Trustee and arising  out of or in  connection  with the
acceptance or



administration  of the trust evidenced by the Indenture  (which  obligation
shall survive the execution hereof).

     4.4 This  Agreement  shall be governed by and  construed in accordance
with the laws of the State of New York, without regard to conflicts of laws
principles thereof.

     4.5 This Agreement may be executed in any number of counterparts  each
of  which  shall  be an  original,  but such  counterparts  shall  together
constitute but one and the same instrument.

     4.6 The  Company,  Resigning  Trustee  and  Successor  Trustee  hereby
acknowledge  receipt of an executed and  acknowledged  counterpart  of this
Agreement and the effectiveness thereof.

     IN WITNESS  WHEREOF,  the parties hereto have caused this Agreement of
Resignation,  Appointment and Acceptance to be duly executed, all as of the
day and year first above written.



                                     ASHLAND INC.

                                     By: /s/ Daragh L. Porter
                                         ----------------------------------
                                         Name:  Daragh L. Porter
                                         Title: VP of Finance and Treasurer



                                     CITIBANK, N.A.
                                     as Resigning Trustee

                                     By: /s/ Nancy Forte
                                         ----------------------------------
                                         Name:  Nancy Forte
                                         Title: Assistant Vice President



                                     WILMINGTON  TRUST COMPANY
                                     as Successor Trustee

                                     By: /s/ Geoffrey J. Lewis
                                         ----------------------------------
                                         Name:  Geoffrey J. Lewis
                                         Title: Financial Services Officer





                                 EXHIBIT A

               Documents to be delivered to Successor Trustee

1.  Conformed copy of the Indenture.

2.  File of closing documents from initial issuance.

3.  Copies of the most recent of each of the SEC reports  delivered  by the
    Company pursuant to Section 7.04 of the Indenture.

4.  A copy of the most recent compliance  certificate delivered pursuant to
    Section 10.04 of the Indenture.

5.  Certified list of Holders as of _______, __, 2006 including certificate
    detail  and  all  "stop  transfers"  and  the  reason  for  such  "stop
    transfers"  (or,  alternatively,  if there are a substantial  number of
    registered  Holders,  the computer tape reflecting the identity of such
    Holders).

6.  Copies of any  official  notices sent by the Trustee to all the Holders
    of the  Securities  pursuant to the terms of the  Indenture  during the
    past  twelve  months  and a copy of the most  recent  Trustee's  annual
    report to Holders delivered pursuant to Section 7.03 of the Indenture.

7.  List of any documents which, to the knowledge of Resigning Trustee, are
    required  to be  furnished  but have not been  furnished  to  Resigning
    Trustee.






                                 EXHIBIT B
                            [COMPANY LETTERHEAD]
                                   NOTICE

                             To the Holders of:

8.80% Sinking Fund Debentures due 2012                  CUSIP # 044540 AH5
Medium-Term Notes, Series E                             CUSIP # 04454  CCW4

                              of ASHLAND INC.

NOTICE IS HEREBY  GIVEN,  pursuant  to Section  6.10 of the  Amendment  and
Restatement  as of August 15, 1990 of the Indenture  dated as of August 15,
1989 (the  "Indenture"),  by and between  Ashland Inc. (the  "Company") and
Citibank,  N.A., as Trustee,  that  Citibank,  N.A. has resigned as Trustee
under the  Indenture,  but will retain the roles of Security  Registrar and
Paying Agent.

     Pursuant to Section 6.11 of the Indenture, Wilmington Trust Company, a
corporation  duly  organized  and  existing  under the laws of the State of
Delaware,  has accepted  appointment  as Trustee under the  Indenture.  The
address of the corporate  trust office of the successor  Trustee is 1100 N.
Market Street, Wilmington, Delaware 19890.

     Citibank's  resignation  as Trustee  and  Wilmington  Trust  Company's
appointment  as  successor  Trustee  were  effective  as of the  opening of
business on November 30, 2006.


Dated:  November 30, 2006



                                                ASHLAND INC.