National Tribal Toxics Council
EPANonrulemakingEPA-HQ-OPPT-2018-0443

Octamethylcyclotetra- siloxane (D4); TSCA Review

RIN
Last modified
May 29, 2026
Comment window
closed 238d ago
National Tribal Toxics Council filings
1

Activity

National Tribal Toxics Council filed 1 comment on this docket between Dec 5, 2025 and Dec 5, 2025. 16 other organizations filed here. The comment window closed 238d ago.

What National Tribal Toxics Council filed (1)

Dec 5, 2025· Comment submitted by National Tribal Toxics Council (NTTC)· EPA-HQ-OPPT-2018-0443-0095

Filed on regulations.gov — full text not in the inline record.

Abstract

EPA is interested in information on Octamethylcyclotetra- siloxane (D4) (CASRN 556-67-2). EPA encourages the public to submit use, hazard, and exposure information to this docket. This chemical is also known as Cyclotetrasiloxane, 2,2,4,4,6,6,8,8-octamethyl-

View on regulations.gov →