Compound record

Octamethylcyclotetrasiloxane

Also known as OMCTS

556-67-2 · candidate list substance / siloxane · cosmetics

SVHC Candidate ListEU monitoringcosmeticsformulation

Dossier

Identity-first dossier for exact-name, CAS, and use-context lookups.

Lookup labels

OMCTS OCTAMETHYLCYCLOTETRASILOXANECyclotetrasiloxane, octamethyl-2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane

Dossier Status Obligations Why Alternatives Changes Similar Sources

CAS 556-67-2

Formula C8H24O4Si4

Molecular weight 296.61 g/mol

InChIKey HMMGMWAXVFQUOA-UHFFFAOYSA-N

Current EU status

Regulatory snapshot for Octamethylcyclotetrasiloxane

Octamethylcyclotetrasiloxane is currently surfaced as candidate list substance in the EU.

The current imported view anchors this substance in CandidateList. The live rationale focuses on PBT (Article 57d) vPvB (Article 57e), and this page is designed for fast status checks before deeper source review.

Searchers usually land here for the chemical name, CAS number, abbreviation OMCTS, and the question of whether the substance is tied to SVHC, REACH, POPs, or SCIP-style compliance work.

Candidate List substancecurrent statuslatest imported framework state

27 Jun 2018latest anchor datelisted, effective, or checked date

Identity

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Fast lookup

CAS 556-67-2 · Formula C8H24O4Si4 · Molecular weight 296.61 g/mol · Current status Candidate List substance

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CAS: 556-67-2
EC: 209-136-7
Formula: C8H24O4Si4
Molecular weight: 296.61 g/mol
Primary class: candidate list substance
Synonym count: 82

Search-friendly summary

Octamethylcyclotetrasiloxane (OMCTS) , CAS 556-67-2, is tracked here as a cosmetics substance in the candidate list substance class.

Common names and aliases

OCTAMETHYLCYCLOTETRASILOXANECyclotetrasiloxane, octamethyl-2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocaneOktamethylcyklotetrasiloxanCyclic dimethylsiloxane tetramerCyclomethicone 4

What to do next

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Status

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Alternatives

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Action prompts

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Article duties

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