THIOL CONTAINING COMPOUNDS AND THEIR PREPARATION

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HAMPSHIRE CHEMICAL CORP.

from W.R. GRACE & CO.-CONN.

ASSIGNMENT OF ASSIGNORS INTEREST. Recorded 1993-03-22

CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), AS COLLATERAL AGENT, THE

from HAMPSHIRE CHEMICAL CORP.

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded 1993-03-08

W.R. GRACE & CO.-CONN.

from GRACE MERGER CORP., A CORP. OF CONN. (CHANGED TO), W.R. GRACE & CO., A CORP. OF CONN. (MERGED INTO)

MERGER EFFECTIVE DATE: MAY 25, 1988 CONNECTICUT Recorded 1988-08-05

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