EXHIBIT 2.33

                                                                  CONFORMED COPY
                                                                 --------------

                           STOCK REPURCHASE AGREEMENT
                           --------------------------

         STOCK  REPURCHASE  AGREEMENT dated as of April 2, 1997 among BLACKSTONE
CAPITAL PARTNERS II MERCHANT BANKING FUND L.P., a limited partnership  organized
under the laws of the State of Delaware  ("BCP"),  BLACKSTONE  OFFSHORE  CAPITAL
PARTNERS II L.P., a limited  partnership  organized under the laws of the Cayman
Islands ("BOCP"),  BLACKSTONE  FAMILY INVESTMENT  PARTNERSHIP II L.P., a limited
partnership  organized  under the laws of the State of Delaware  ("BFIP"),  UCAR
INTERNATIONAL  INC.,  a  corporation  organized  under  the laws of the State of
Delaware (the  "Company")  and, as to Sections  6(a) and 7-13 of this  Agreement
only, CHASE EQUITY ASSOCIATES,  L.P., a limited partnership  organized under the
laws of the State of California ("Chase Equity Associates").  BCP, BOCP and BFIP
are  each  sometimes  referred  to  herein  as  a  "Blackstone  Party"  and  are
collectively referred to herein as the "Blackstone Parties."

                              W I T N E S S E T H :

         WHEREAS,  it is expected  that  certain  shares of common  stock of the
Company,  par value $.01 per share  (the  "Common  Stock"),  will be sold by the
Blackstone  Parties  in a  public  offering  (the  "Offering")  pursuant  to  an
Underwriting  Agreement  (the  "Underwriting  Agreement")  dated the date hereof
among  the  Company,   the  Blackstone  Parties,   Credit  Suisse  First  Boston
Corporation  and the other U.S.  Underwriters  named therein and a  Subscription
Agreement  (the  "Subscription  Agreement")  dated  the date  hereof  among  the
Company, the Blackstone Parties, Credit Suisse First Boston (Europe) Limited and
the other Managers named therein,  which shares are being registered for sale to
the public under the Securities Act of 1933, as amended (the "Act"), pursuant to
a Registration Statement on Form S-3 (file no. 333-23073); and

         WHEREAS, the Board of Directors of the Company has authorized a program
to  repurchase  up to $100  million  of  Common  Stock  (the  "Stock  Repurchase
Program"); and

         WHEREAS,  each Blackstone Party desires to sell to the Company, and the
Company  desires to repurchase  from each  Blackstone  Party,  certain shares of
Common Stock currently owned by such Blackstone Party as set forth on Schedule I
(referred to below) ("Repurchase  Shares") on the terms and conditions set forth
herein; and

         WHEREAS,  the Company  intends to effect such  repurchase of Repurchase
Shares from each Blackstone Party upon  consummation of the Offering pursuant to
the Stock Repurchase Program.
                                      

                                      -1-


                                      
        NOW, THEREFORE,  in consideration of the  representations,  warranties,
covenants and agreements contained herein, the parties,  intending to be legally
bound, agree as follows:

         1. SALE AND  REPURCHASE.  Upon the terms and subject to the  conditions
set forth  herein,  at the  Closing  (as  defined  in  Section 2  hereof),  each
Blackstone Party shall sell, assign and deliver to the Company,  and the Company
shall repurchase from each Blackstone  Party,  all right,  title and interest in
and to the  number of  Repurchase  Shares  set forth  opposite  the name of such
Blackstone  Party on Schedule I. In consideration  for the sale,  assignment and
delivery of such  Repurchase  Shares,  at the Closing,  the Company shall pay to
each Blackstone Party $36.575 per Share.

         2. CLOSING.  The closing of the sale and  repurchase of the  Repurchase
Shares hereunder (the "Closing") will occur at the offices of Cravath,  Swaine &
Moore in New York City on the First Closing Date (as defined in the Underwriting
Agreement and the Subscription Agreement) upon the closing (the "First Closing")
of the sale of U.S. Firm  Securities (as defined in the  Underwriting  Agreement
and the Subscription Agreement) on such First Closing Date.
At the Closing:

            (a) the  Company  will  deliver  by  wire  transfer  in  immediately
available funds to a bank account  designated by each Blackstone Party by notice
to the  Company  not later  than two  business  days  prior to the  Closing  the
aggregate  repurchase  price payable to such Blackstone Party in accordance with
the price per share set forth in  Paragraph 1 hereof for each  Repurchase  Share
repurchased by the Company from each  Blackstone  Party as set forth on Schedule
I;

            (b) each Blackstone Party will deliver to the transfer agent for the
Common  Stock  (as  agent  for  the  Company)  a  certificate  or   certificates
representing  the  Repurchase  Shares  to be  sold  by  such  Blackstone  Party,
registered in the name of such Blackstone  Party duly endorsed for transfer,  as
set forth on  Schedule I  attached  to, and in  accordance  with,  the Letter of
Instruction from the Company to the transfer agent attached as Exhibit A hereto;
and

            (c) each Blackstone Party will furnish to the Company a certificate,
dated the date of the Closing,  signed by such Blackstone Party or an authorized
signatory thereof, in substantially the form attached as Exhibit B hereto.

         3.  REPRESENTATIONS  AND  WARRANTIES OF THE  BLACKSTONE  PARTIES.  Each
Blackstone  Party  represents  and warrants to the Company as of the date hereof
and the Closing as follows:

            (a) Such Blackstone  Party has valid and  unencumbered  title to the
Repurchase  Shares to be delivered by or on behalf of such  Blackstone  Party at
the Closing,  and full right,  power and authority to enter into this  Agreement
and to sell, assign,  transfer and deliver the Repurchase Shares to be delivered
by or on behalf of such  Blackstone  Party at the Closing;  and upon delivery of
and payment for the  Repurchase  Shares to be  delivered by or on behalf of such
Blackstone  Party at the Closing,  assuming the Company acquires such Repurchase
Shares in good faith and without  notice of any adverse claim within the meaning
of the Uniform

                                      -2-

                                        

Commercial  Code  currently in effect in the State of New York, the Company will
acquire valid and unencumbered title to the Repurchase Shares to be delivered by
or on behalf of such Blackstone Party at the Closing.

            (b) Such  Blackstone  Party  has been  duly  organized  as a limited
partnership and is in good standing under the laws of the  jurisdiction in which
it was organized.  Such jurisdictions are the State of Delaware,  in the case of
the BCP and BFIP, and the Cayman Islands, in the case of BOCP.

            (c) This Agreement has been duly authorized and validly executed and
delivered by such Blackstone  Party and,  assuming due execution and delivery by
the other  parties,  constitutes a valid and legally  binding  agreement of such
Blackstone Party,  enforceable  against such Blackstone Party in accordance with
its  terms,  subject  to  applicable  bankruptcy,  insolvency,   reorganization,
moratorium, fraudulent transfer and similar laws affecting creditors' rights and
remedies  generally and to general  principles of equity  (regardless of whether
enforcement is sought in a proceeding at law or in equity).

            (d) No  consent,  approval,  authorization,  or order  of, or filing
with, any governmental agency or body or any court or arbitrator or by any court
or  arbitrator  is  required to be  obtained  by such  Blackstone  Party for the
consummation  of the  transactions  contemplated by this Agreement in connection
with the  sale by such  Blackstone  Party of the  Repurchase  Shares  set  forth
opposite  such  Blackstone  Party's  name on  Schedule I, except such as have no
material adverse effect on the consummation of the transactions  contemplated by
this Agreement.

            (e) The  sale of the  Repurchase  Shares  set  forth  opposite  such
Blackstone  Party's name on Schedule A, the execution,  delivery and performance
of this Agreement, the consummation of the transactions  contemplated herein and
the fulfillment of the terms hereof, will not result in a breach or violation of
any of the terms and provisions of, or constitute a default under,  any material
agreement or  instrument to which such  Blackstone  Party is a party or by which
such  Blackstone  Party  is  bound or to  which  any of the  properties  of such
Blackstone Party is subject, or the agreement of limited partnership or articles
of partnership of such Blackstone Party,  except in each case where such breach,
violation or default has no material  adverse effect on the  consummation of the
transactions  contemplated by this Agreement, and such Blackstone Party has full
partnership  power and authority to sell the Repurchase  Shares to be sold by it
as contemplated by this Agreement.

            (f) The  sale of the  Repurchase  Shares  set  forth  opposite  such
Blackstone  Party's name on Schedule I, the execution,  delivery and performance
of this Agreement,  the consummation of the transactions herein contemplated and
the fulfillment of the terms hereof, will not result in a breach or violation of
any of the terms and provisions of any statute or any rule,  regulation or order
applicable to such Blackstone Party of any governmental agency or body or court,
domestic or foreign,  having  jurisdiction  over such Blackstone Party or any of
its properties.

                                      -3-

 

         4.   REPRESENTATIONS  AND  WARRANTIES  OF  THE  COMPANY.   The  Company
represents and warrants to the Blackstone  Parties as of the date hereof and the
Closing that:

            (a) The Company has been duly  incorporated  and is validly existing
as a corporation in good standing under the laws of the State of Delaware.

            (b) This Agreement has been duly authorized and validly executed and
delivered by the Company and,  assuming due  execution and delivery by the other
parties,  constitutes  a valid and legally  binding  obligation  of the Company,
enforceable  against  the  Company  in  accordance  with its  terms,  subject to
applicable  bankruptcy,  insolvency,   reorganization,   moratorium,  fraudulent
transfer and similar laws affecting creditors' rights and remedies generally and
to general principles of equity (regardless of whether  enforcement is sought in
a proceeding at law or in equity).

            (c) The repurchase of the Repurchase Shares, the execution, delivery
and  performance  of  this  Agreement,  the  consummation  of  the  transactions
contemplated herein and the fulfillment of the terms hereof will not result in a
breach or  violation  of any of the terms and  provisions  of, or  constitute  a
default under, any material  agreement or instrument to which UCAR is a party or
by which  UCAR is bound or to which any of the  properties  of UCAR is  subject,
except  where  such  breach,  violation  or  default  (individually  or  in  the
aggregate)  would  not  have  a  Material  Adverse  Effect  (as  defined  in the
Underwriting  Agreement).  The Company has full corporate power and authority to
repurchase the Repurchase Shares as contemplated by this Agreement.

            (d) No  consent,  approval,  authorization,  or order  of, or filing
with, any governmental agency or body or any court or arbitrator or by any court
or arbitrator is required to be obtained by the Company for the  consummation of
the  transactions   contemplated  by  this  Agreement  in  connection  with  the
repurchase  by the  Company of the  Repurchase  Shares,  except  such as have no
material adverse effect on the consummation of the transactions  contemplated by
this Agreement.

            (e) The  repurchase  of the  Repurchase  Shares by the Company,  the
execution,  delivery and performance of this Agreement,  the consummation of the
transactions  herein  contemplated  and the fulfillment of the terms hereof will
not result in a breach or  violation of any of the terms and  provisions  of any
statute  or any rule,  regulation  or order  applicable  to the  Company  or any
governmental agency or body or court,  domestic or foreign,  having jurisdiction
over the Company or any of its properties.

         5.  CONDITIONS TO THE  OBLIGATIONS  OF THE  BLACKSTONE  PARTIES AND THE
COMPANY;  TERMINATION. The obligations of each of the Blackstone Parties and the
Company to consummate the Closing are subject to the following  conditions:  (a)
no Repurchase  Shares shall be sold and repurchased  hereunder unless all of the
Repurchase  Shares are  concurrently  sold and repurchased and (b) no Repurchase
Shares shall be sold and  repurchased  hereunder  unless the First Closing shall
occur concurrently or shall have occurred on or prior to April 30, 1997. If


                                      -4-

                            

the First Closing  shall not have  occurred on or prior to April 30, 1997,  this
Agreement shall terminate and have no further force or effect without  liability
hereunder on the part of any party (even if the First Closing does not occur due
to an action or omission of a party hereto under the  Underwriting  Agreement or
the Subscription Agreement).

         6. TERMINATION OF CERTAIN PROVISIONS.
           
            (a) Upon the  earlier of (x) 90 days  after the date of the  Closing
and (y) the time when each of the Blackstone  Parties shall have ceased to be an
"affiliate"  of the Company  within the  meaning of Rule 144 under the Act,  the
provisions  of Sections  2.1, 2.3, 2.4, 2.5, 2.6, 3.1 and 4.2 of the Amended and
Restated  Stockholders  Agreement dated as of February 29, 1996 among BCP, BOCP,
BFIP,  Chase  Equity  Associates  and the  Company,  and any  irrevocable  proxy
executed by Chase Equity Associates in favor of BCP, shall terminate and have no
further force or effect.

            (b) Upon the  earlier of (x) 90 days  after the date of the  Closing
and (y) the time when each of the Blackstone  Parties shall have ceased to be an
"affiliate" of the Company within the meaning of Rule 144 under the Act:

                (i)    the provisions of Sections 3.7 ("Drag-Along Rights"), 3.9
                       ("Tagalong Rights") and 3.10 ("Voting Agreement") of each
                       of the Management  Common Stock  Subscription  Agreements
                       (For Option Repurchase Shares) among the Company, each of
                       the  executives  of the Company whose names are set forth
                       on Schedule A hereto and (as to Sections  3.7,  3.8,  3.9
                       and 3.10 of such agreements only) BCP (collectively,  the
                       "Option  Repurchase Shares  Agreements")  shall terminate
                       and have no further force or effect;

                (ii)   the provisions of Sections 3.7 ("Drag-Along Rights"), 3.9
                       ("Tagalong Rights") and 3.10 ("Voting Agreement") of each
                       of the Management  Common Stock  Subscription  Agreements
                       (For  Repurchased  and Matched Shares) among the Company,
                       each of the members of  management  of the Company  whose
                       names  are set  forth on  Schedule  B  hereto  and (as to
                       Sections 3.7, 3.8, 3.9 and 3.10 of such agreements  only)
                       BCP  (collectively,  the  "Repurchased and Matched Shares
                       Agreements") shall terminate and have no further force or
                       effect; and

                (iii)  any irrevocable  proxy executed  pursuant to Section 3.10
                       of any of the Option Shares Agreements or the Repurchased
                       and Matched  Shares  Agreements by any of the  executives
                       whose  names  are set  forth on  Schedules  A or B hereto
                       shall terminate and have no further force or effect.

                                       

                                      -5-



         7. GOVERNING LAW;  SUBMISSION TO JURISDICTION.  This Agreement shall be
governed by, and  construed  in  accordance  with,  the laws of the State of New
York,  without  regard to principles of conflicts of laws.  The parties agree to
submit to the  jurisdiction  of federal  and state  courts  located in the City,
County  and State of New York in any  action  or  proceeding  arising  out of or
relating to this Agreement.

         8. CAPTIONS; HEADINGS. The captions and headings in this Agreement have
been inserted for  convenience of reference only and shall not control or affect
the meaning or construction of any of the provisions hereof.

         9. NOTICES. All notices, requests or other communications to any of the
parties hereunder shall be given in writing and shall be personally delivered or
sent by facsimile transmission:

            if to any of the Blackstone Parties, to:

                           c/o Blackstone Management Associates II L.L.C.
                           345 Park Avenue
                           31st Floor
                           New York, New York 10154
                           Facsimile: 212-754-8704
                           Attention: Mr. Glenn H. Hutchins

            if to the Company, to:

                           UCAR International Inc.
                           39 Old Ridgebury Road
                           Danbury, Connecticut 06817
                           Facsimile: 203-207-7785
                           Attention: General Counsel

            if to Chase  Equity  Associates,  to the address or  facsimile     
            number as shown on the stock register of the Company.

         10.  SUCCESSORS AND ASSIGNS.  Each term and condition of this Agreement
shall  inure to the  benefit  of and be  binding  upon  the  parties  and  their
respective successors and assigns; PROVIDED,  HOWEVER, that no party may assign,
delegate  or  otherwise  transfer  any of its rights or  obligations  under this
Agreement without the written consent of the other parties.

         11.  ENTIRE  AGREEMENT;  THIRD  PARTY  BENEFICIARIES.   This  Agreement
constitutes  the entire  agreement among the parties with respect to the subject
matter   hereof.   This   Agreement   supersedes   all  prior   agreements   and
understandings,  both oral and  written,  among the parties  with respect to the
subject matter hereof. No provision of this Agreement is intended to confer upon
any person other than the parties any rights or remedies.



                                      -6-



         12.  AMENDMENTS  AND WAIVERS.  Any  provision of this  Agreement may be
amended  or waived if,  but only if such  amendment  or waiver is set forth in a
written  instrument  and is signed,  in the case of an amendment,  by all of the
parties  or, in the case of a waiver,  by the party  against  whom the waiver is
sought to be effective.

         13. COUNTERPARTS.  This Agreement may be executed in counterparts, each
of which  shall  be an  original  instrument  and all of  which  together  shall
constitute  the  same  instrument,  with the same  effect  as if the  signatures
thereto and hereto were upon the same instrument.


                                      -7-



         IN WITNESS WHEREOF, the parties have duly executed this Agreement as of
the date first written above.


                                   BLACKSTONE CAPITAL PARTNERS II
                                   MERCHANT BANKING FUND L.P.

                                   By:  Blackstone Management
                                        Associates II L.L.C., General Partner


                                   By:  /s/ Howard A. Lipson
                                        --------------------------------
                                        Name:   Howard A. Lipson
                                        Title:  Member



                                   BLACKSTONE OFFSHORE CAPITAL
                                   PARTNERS II L.P.

                                   By:  Blackstone Management
                                        Associates II L.L.C., General Partner


                                   By:  /s/ Howard A. Lipson
                                        -------------------------------
                                        Name:  Howard A. Lipson
                                        Title: Member



                                   BLACKSTONE FAMILY INVESTMENT
                                   PARTNERSHIP II L.P.

                                   By:  Blackstone Management
                                        Associates II L.L.C., General Partner


                                   By:  /s/ Howard A. Lipson
                                        -------------------------------
                                        Name:  Howard A. Lipson
                                        Title: Member



                                      -8-

    
                                   UCAR INTERNATIONAL INC.




                                   By: /s/ Peter B. Mancino
                                       --------------------------------
                                       Name:   Peter B. Mancino
                                       Title:  Vice President


 

                                      -9-



                                   CHASE EQUITY ASSOCIATES, L.P.
                                   (as to Sections 6(a) and 7-13 of this 
                                    Agreement only)


                                   By: Chase Capital Partners

                                   By: /s/ Brian J. Richmand
                                       -------------------------------
                                       Name:   Brian J. Richmand
                                       Title:  General Partner




                                      -10-


                                   SCHEDULE A

                          TO STOCK REPURCHASE AGREEMENT

Arnold, John C.
Attwell, John W.
Badoux, Alain
Bailine, Frederick G.
Barnard, P.J.
Beightol, Frederick A.
Beling, Luis Roberto
Bowman, Brian
Brewer, Kim C.
Burroughs, Walter J.
Calarco, Paul
Casiello, Gerald L.
Cate, William D.
Cereceda, A.L.
Chang, Chiag-Feng
Dell, Rodney J.
Diaz Campos, Alvaro
Dowdle, Douglas C.
Dzernejro, Albert J.
Echevarria, H.
Flowers, Roger H.
Freitas, Luis Augusto
Frisario, Nicola
Hart, Robert J.
Haworth, Joseph D.
Hewson, Robert E.
Iglesias Arria, Miguel D.
Kent, Edgar F.
Kippax, P.
Kozak, Philip E.
Krass, Robert P.
Lewis, Irwin C.
Magnani, Piero
Mancino, Peter B.
Martinez, Jose Luiz L.
McKnight, James R.
McGlanery, Joe T.
Meroni, Giuseppe
Mitchem, R.L.
Narwold, Karen G.


                                      -11-



Norton, Michael T.
Overcash, Herman A.
Peirotes, Guy
Pelletier, R.
Perez, Nemesio
Phipps, C.W.
Pretorius, H.L.
Ramos, Sergio de A.
Reep, David B.
Scienski, Patricia E.
Shen, Wei-Ming
Snyder, Dudley D.
Stamm, Robert C.
Tjaarda, James T.
Twigg, Geoffrey
Vautier, Georges
Wenske, James R.
Westfall, James E.
Wetula, John J.
Wiemels, William P.
Wilkinson, Terry W.
Wimer, James H.
Wise, Francis E.
Wolf, Fred C.


                                      -12-

 
                                   SCHEDULE B

                          TO STOCK REPURCHASE AGREEMENT

Arnold, John C.
Bailine, Frederick G.
Beling, Luis R.
Carter, Donald A.
Casiello, Gerald L.
Cassilly, Thomas C.
Cate, William D.
Dowdle, Douglas C.
Echevarria-Estella, Honoratio
Flowers, Roger M.
Hamm, George A.
Hart, Robert J.
Krass, Robert P.
Mancino, Peter B.
Pelletier, Raymond
Ross, Robert M.
Twigg, Geoffrey
Wiemels, William P.
Wolf, Fred C.


                                      -13-

  
                                                        EXHIBIT A




                                                          April  , 1997

The Bank of New York,
   as Transfer Agent
101 Barclay Street, 12W
New York, New York  10286
Attn:  Diana Ajjan

                  Re:      UCAR INTERNATIONAL INC.

Ladies and Gentlemen:

                   Reference  is  made  to  the  offering  (the  "Offering")  of
5,800,000 shares (the "Offering  Shares") of common stock of UCAR  International
Inc.  (the  "Company"),  par value $.01 per share  (the  "Common  Stock"),  made
pursuant to the  Underwriting  Agreement  dated April , 1997 (the  "Underwriting
Agreement") among the Company,  Blackstone  Capital Partners II Merchant Banking
Fund L.P.,  ("BCP"),  Blackstone  Offshore  Capital  Partners II L.P.  ("BOCP"),
Blackstone Family Investment  Partnership II L.P. ("BFIP" and, together with BCP
and BOCP, the "Selling Stockholders") and Credit Suisse First Boston Corporation
("CSFB") and the other Underwriters named therein and the Subscription Agreement
dated  April ,  1997  (the  "Subscription  Agreement"  and,  together  with  the
Underwriting  Agreement,  each, an "Agreement")  among the Company,  the Selling
Stockholders  and Credit  Suisse  First  Boston  (Europe)  Limited and the other
Managers  named  therein.   In  connection   with  the  Offering,   the  Selling
Stockholders  granted the  Underwriters and the Managers an option to purchase a
maximum  of  611,227  additional  shares of Common  Stock  (the  "Over-Allotment
Shares") solely to cover  over-allotments  of shares.  Reference is also made to
the repurchase by the Company of 1,300,000 shares (the  "Repurchase  Shares") of
Common  Stock from the Selling  Stockholders  pursuant  to the Stock  Repurchase
Agreement  dated as of  April , 1997  (the  "Repurchase  Agreement")  among  the
Company, the Selling Stockholders and Chase Equity Associates, L.P.

                   In  connection  with the sale of the Offering  Shares and the
repurchase of Repurchase Shares, each Selling Stockholder has submitted to you a
certificate representing a number of shares greater than the aggregate number of
Offering  Shares  and  Repurchase  Shares  to  be  sold  by  each  such  Selling
Stockholder  (such  difference,  the  "Excess  Shares").  The number of Offering
Shares,  Repurchase  Shares  and Excess  Shares  with  respect  to each  Selling
Stockholder are set forth in the table attached as Schedule A hereto.



                   Of the  aggregate  9,137,385  shares of Common Stock you have
received from the Selling  Stockholders,  you are hereby instructed with respect
to such shares as follows.

                   1.  OFFERING  SHARES.  You are  hereby  authorized  to  cause
certificate(s)  evidencing  5,800,000  shares of Common Stock,  representing the
aggregate   Offering  Shares  of  the  Selling   Stockholders,   to  be  issued,
countersigned  and registered in accordance  with the  instructions  of CSFB, on
behalf of itself and the other Underwriters and Managers.  These  certificate(s)
should be issued without any restrictive legend.

                   2. REPURCHASE  SHARES.  You are hereby authorized to register
in the name of the Company  1,300,000  shares of Common Stock,  representing the
aggregate Repurchase Shares of the Selling  Stockholders,  and treat such shares
as treasury shares.

                   3.  OVER-ALLOTMENT SHARES AND EXCESS  SHARES.  You are hereby
authorized to cause three certificates evidencing 1,498,728, 373,253 and 145,404
shares of Common Stock, respectively,  representing the aggregate Over-Allotment
Shares  and  Excess  Shares  of  each of  BCP,  BOCP  and  BFIP,  to be  issued,
countersigned  and registered in the names of BCP, BOCP and BFIP,  respectively.
These certificates should be issued with the following restrictive legend:



                   THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE
                   BEEN  REGISTERED  WITH THE  SECURITIES AND EXCHANGE
                   COMMISSION IN ACCORDANCE  WITH THE  SECURITIES  ACT
                   (THE "ACT") OF 1933 AND MAY BE TRANSFERRED PURSUANT
                   THERETO WHILE SUCH  REGISTRATION  IS EFFECTIVE.  IF
                   SUCH REGISTRATION IS NOT EFFECTIVE,  THE SECURITIES
                   REPRESENTED   BY  THIS   CERTIFICATE   MAY  NOT  BE
                   TRANSFERRED UNLESS THEY ARE SUBSEQUENTLY REGISTERED
                   PURSUANT TO THE ACT OR AN  EXEMPTION  THEREFROM  IS
                   AVAILABLE.


                  Should any questions arise,  please contact me immediately for
instructions.

                                             Very truly yours,



                                             Peter B. Mancino
                                             General Counsel




                                 -2-




                                                                                                                          SCHEDULE I
                                                                                                            TO LETTER OF INSTRUCTION
                                                       UCAR SECONDARY OFFERING

                                                                                                 

====================================================================================================================================
                                                                                                          Over-
Blackstone          Certificate       Shares          Offering      Repurchase        Interest          Allotment       Excess
 Entity               Number      Currently Owned     Shares(1)       Shares           Shares            Shares         Shares(2)
- ------------------------------------------------------------------------------------------------------------------------------------
BCP                  TUC 109        6,721,584        4,266,558        956,298        1,056,655          442,073       1,498,728
- -----------------------------------------------------------------------------------------------------------------------------------
BOCP                 TUC 110        1,763,684        1,119,507        250,924          257,257          115,577         373,253
- ------------------------------------------------------------------------------------------------------------------------------------
BFIP                 TUC 111          652,117          413,935         92,778          102,515           42,889         145,404
- ------------------------------------------------------------------------------------------------------------------------------------
TOTAL                               9,137,385        5,800,000      1,300,000        1,416,427          600,958       2,017,385
- ------------------------------------------------------------------------------------------------------------------------------------
Legend on Shares     1933 Act           N/A             No         N/A (shares        1933 Act          1933 Act        1933 Act
                      legend                        restrictive      will be           legend          legend (if        legend
                                                      legends    noncertificated                       option not
                                                                    treasury                           exercised)
                                                                     shares)
====================================================================================================================================


- ------------------
(1) Assuming over-allotment option is not exercised concurrently 
    with the First Closing.

(2) Consists of Retained Interest Shares and Over-Allotment Shares.



                                                                -3-



                                                                       EXHIBIT B
                                   CERTIFICATE
                                   -----------


                   Reference  is made to the  Stock  Repurchase  Agreement  (the
"Stock Repurchase  Agreement"),  dated April ___, 1997, among UCAR International
Inc.  (the  "Company"),  the  Blackstone  Parties named therein and Chase Equity
Associates,  L.P. Capitalized terms used herein and not otherwise defined herein
shall have the meanings ascribed to them in the Stock Repurchase Agreement.

                   The undersigned, Stephen A. Schwarzman, hereby certifies that
he is a  founding  member of  Blackstone  Management  Associates  II  L.L.C.,  a
Delaware limited liability  company ("BMA"),  which is a general partner of each
of Blackstone Capital Partners II Merchant Banking Fund L.P., a Delaware limited
partnership  ("BCP"),  Blackstone  Offshore  Capital  Partners II L.P., a Cayman
Islands  limited   partnership   ("BOCP")  and  Blackstone   Family   Investment
Partnership II L.P., a Delaware limited partnership ("BFIP"). BCP, BOCP and BFIP
are collectively referred to herein as the "Partnerships."

                  (a) The  undersigned is authorized to execute and deliver this
Certificate  on  behalf  of each  of the  Partnerships  by the  terms  of  their
respective  limited  partnership  agreements and the limited  liability  company
operating documents of BMA.

                  (b) As of the date hereof, the  representations and warranties
of each of the Partnerships in the Stock Repurchase  Agreement dated as of April
___, 1997 among the Partnerships,  the Company and Chase Equity Associates, L.P.
(the "Stock Repurchase Agreement") that are qualified as to materiality are true
and  correct,  and those not so  qualified  are true and correct in all material
respects.

                  (c)  The  execution  and  delivery  of  the  Stock  Repurchase
Agreement and the performance by the  Partnerships  of all of their  obligations
thereunder have been authorized by all necessary  partnership action on the part
of each of the Partnerships and have been approved by BMA and the actions of BMA
have been authorized in accordance with the operating documents of BMA.

                  This  Certificate  may only be relied  upon by the Company and
counsel to the Company.

                  IN  WITNESS   WHEREOF,   the  undersigned  has  executed  this
Certificate on this ___ day of April, 1997.




                                       ----------------------------------
                                       Stephen A. Schwarzman