EXHIBIT 10-i(1)

                               FIRST AMENDMENT TO

                          REGISTRATION RIGHTS AGREEMENT

     THIS FIRST AMENDMENT TO REGISTRATION RIGHTS AGREEMENT is made and entered
into the 19th day of March, 1999 ("Amendment"), between MEMC Electronic
Materials, Inc., a Delaware corporation (the "Company"), and VEBA Corporation, a
Delaware corporation ("VEBA").

     WHEREAS, the Company and Huls Corporation ("Huls") entered into a
Registration Rights Agreement dated as of July 12, 1995 (the "Agreement");

     WHEREAS, on September 30, 1998, Huls merged with and into VEBA and thus
VEBA became the successor in interest to Huls under the Agreement;

     WHEREAS, on the date hereof VEBA (as successor to Huls) is the owner of
21,490,942 shares of the Company's Common Stock, par value $.01 per share (the
"Common Stock");

     WHEREAS, the Company and VEBA entered into (i) a Purchase Agreement dated
as of October 22, 1998 (as amended on December 29, 1998 and February 14, 1999,
the "Purchase Agreement") pursuant to which VEBA agreed to purchase and the
Company agreed to issue to VEBA a number of shares of Common Stock equal to
106,100,000 divided by the Purchase Price (as defined in the Purchase Agreement)
rounded up to the nearest whole number and (ii) a Standby Agreement dated as of
October 22, 1998 (the "Standby Agreement") pursuant to which VEBA agreed to
purchase and the Company agreed to issue to VEBA the shares of Common Stock
offered in a registered rights offering (the "Rights Offering") to all of the
Company's existing stockholders (other than VEBA and its affiliates) and not
otherwise subscribed for by the other stockholders of the Company prior to the
expiration time of such rights;

     WHEREAS, it is a condition to the closing under each of the Purchase
Agreement and the Standby Agreement that the Agreement shall have been amended
to include all shares of Common Stock acquired or to be acquired or purchased or
to be purchased by VEBA, VEBA Aktiengesellschaft, a German stock corporation
("VEBA AG"), or any Subsidiaries of VEBA AG after October 22, 1998.

     NOW, THEREFORE, in consideration of the mutual covenants, promises,
representations, warranties and conditions set forth in this Amendment, the
parties hereto, intending to be legally bound, hereby agree as follows:

     1.   All references in the Agreement to "Huls Corporation" and "Huls" are
hereby amended by deleting each such reference and substituting in lieu thereof
"VEBA Corporation" or "VEBA," respectively.

     2.   The definitions of "Holder" and "Registrable Stock" in Section 1 of
the Agreement are hereby deleted in their entirety and the following definitions
are substituted in lieu thereof:

          ""Holder" shall mean (i) VEBA, VEBA AG and any Subsidiary of VEBA AG
     that beneficially owns on the date hereof, or hereinafter acquires or
     purchases, shares of Common Stock and (ii) any transferee or assignee to
     whom the rights under this Agreement are assigned in accordance with the
     provisions of Section 9 hereof;

          "Purchase Agreement" shall mean that certain Purchase Agreement dated
     as of October 22, 1998, as amended from time to time, by and among the
     Company and VEBA;

          "Registrable Stock" shall mean the Common Stock beneficially owned on
     the date hereof, or hereafter acquired or purchased, by VEBA, VEBA AG or
     any Subsidiary of VEBA AG, including, without limitation, any Common Stock

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     (i)  acquired by VEBA, VEBA AG or any Subsidiary of VEBA AG as a result of
     the transactions contemplated by the Purchase Agreement or the Standby
     Agreement or upon exercise of any rights to purchase Common Stock, (ii)
     purchased on the open market by VEBA, VEBA AG or any Subsidiary of VEBA AG
     or (iii) issued to VEBA, VEBA AG or any Subsidiary of VEBA AG as a dividend
     or other distribution or by way of a stock split. For purposes of this
     Agreement, any Registrable Stock shall cease to be Registrable Stock when
     (x) a registration statement covering such Registrable Stock has been
     declared effective and such Registrable Stock has been disposed of pursuant
     to such effective registration statement or (y) such Registrable Stock is
     sold or distributed pursuant to Rule 144 (or any similar or successor
     provision (but not Rule 144A)) under the Securities Act.

          "Standby Agreement" shall mean that certain Standby Agreement dated as
     of October 22, 1998, as amended from time to time, by and among the Company
     and VEBA.

          "Subsidiary" shall mean, with respect to any person or entity, any
     other person or entity of which more than 50% of the capital stock or other
     ownership interest is owned, or is controlled, either directly or
     indirectly, by such person or entity.

          "VEBA AG" shall mean VEBA Aktiengesellschaft, a German corporation and
     the direct and indirect owner of 100% of the common stock of VEBA."

     3.   Section 2, paragraph (a) of the Agreement is hereby amended by
inserting at the end thereof the following:

          "Within 10 days following the receipt of each notice under this
     Section 2, the Company shall give all Holders (other than the Requesting
     Holders) written notice of the receipt thereof, which written notice shall
     include a copy of the notice by the Requesting Holders. Upon the written
     request of any Holder received by the Company no later than 15 days after
     the Company's notice, the Company shall use its best efforts to cause to be
     included in the Demand Registration all of the Registrable Stock that each
     such Holder has so requested to be included."

     4.   The following new Section 18 is hereby inserted after Section 17 of
the Agreement:

          "Section 18. Third Party Beneficiaries." Each Holder shall be deemed
     to be a third party beneficiary of this Agreement and shall have the right
     to enforce directly against the Company all of the provisions contained in
     this Agreement, as amended from time to time, notwithstanding that it is
     not a signatory to this Agreement."

     5.   Unless otherwise provided herein, any term in initial capital letters
used as a defined term but not defined in this Amendment shall have the meaning
set forth in the Agreement.

     6.   Except as modified herein, all terms and conditions of the Agreement
shall remain in full force and effect.

     7.   This Amendment shall be governed by, and construed in accordance with,
the laws of the State of New York.

     IN WITNESS WHEREOF, each of the parties hereto has caused this Amendment to
be executed as of the date first above written.


                           VEBA CORPORATION

                           By:  /s/ A. Paul Brandimarte, Jr.

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                                -------------------------------------------
                                Name:  A. Paul Brandimarte, Jr.
                                Title:  Vice President


                           MEMC ELECTRONIC MATERIALS, INC.

                           By:  /s/ James M. Stolze
                               --------------------------------------------
                               Name:  James M. Stolze
                               Title: Executive Vice President
                                      and Chief Financial Officer

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