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Annex II Entry 452 CMR20/10/2010

6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane

6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

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Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 452
CMR

Chemical identity and properties

PubChem 2D chemical structure for CAS 37894-46-5
CAS 37894-46-5PubChem CID 93200

Etacelasil

Etacelasil is an organosilicon compound. — ChEBI

IUPAC name
2-chloroethyl-tris(2-methoxyethoxy)silane
Molecular formula
C11H25ClO6Si
Molecular weight
316.85 g/mol
Exact mass
316.1108927 Da
Topological polar surface area
55.4 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
6
Covalent units
1
Defined stereocentres
0

Also known as

AlsolEtacelsalEtacelasil [BSI:ISO]6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecaneCGA 135862-Chloroethyltris(2-methoxyethoxy)silaneUNII-LYC02T2WPDLYC02T2WPD
10 more reported names
EINECS 253-704-72,5,7,10-Tetraoxa-6-silaundecane, 6-(2-chloroethyl)-6-(2-methoxyethoxy)-ETACELASIL [ISO]CGA-13586Silane, 2-chloroethyltris(2-methoxyethoxy)-RefChem:1379786-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane (9CI)CHEBI:82252SLZWEMYSYKOWCG-UHFFFAOYSA-NDB-227744
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Record details

Chemical name

6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane

Regulatory information

Regulation

(EC) 2009/1223

See every entry this act set

SCCS opinions

  • Opinion concerning Chemical Ingredients in Cosmetic Products classified as Carcinogenic, Mutagenic or Toxic to Reproduction according to the Chemicals Directive 67/548/EECC
  • Opinion concerning Chemical Ingredients in Cosmetic Products classified as Carcinogenic, Mutagenic or Toxic to Reproduction according to the Chemicals Directive 67/548/EEC

CMR

CategoryCarcinogenicMutagenicReprotoxic
Cat. 1B——✓

Key data

CAS
37894-46-5
EC
253-704-7
Annex
II
Entry number
452

Direct matches are limited for this record, so nearby entries from Annex II are shown as well.

Annex II 454
Nearby record in the same annex

Cobalt sulphate

CAS: 10124-43-3
EC: 233-334-2
Annex II 457
Nearby record in the same annex

Nickel dioxide

CAS: 12035-36-8
EC: 234-823-3

What Annex II means for 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane

6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane is listed as a prohibited substance under Annex II of EU Cosmetics Regulation 1223/2009 and must not be intentionally added. Article 17 separately addresses unintended small quantities that are technically unavoidable under good manufacturing practice and compatible with the Article 3 safety requirement.

Formulators must screen their ingredients and raw materials to ensure none contain this substance. Suppliers should provide documentation confirming absence when requested.

The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Verify this substance is absent from all raw materials and finished formulations.
  • Request absence confirmation or CoA from raw material suppliers.
  • Document the screening result in the Product Information File (PIF).
  • This substance has CMR classification. Review the CMR table above and verify current Annex II/III status before use.

Frequently asked questions

Yes. 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane is listed in Annex II of EU Cosmetics Regulation 1223/2009 and is prohibited as an intentionally added cosmetic ingredient. Article 17 provides a narrow exception for unintended small quantities that are technically unavoidable under good manufacturing practice, provided the product remains safe under Article 3.

CAS 37894-46-5 is the unique numerical identifier assigned to 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane has a CMR (carcinogenic, mutagenic or reprotoxic) classification under EU CLP Regulation. Under Article 15 of EU Cosmetics Regulation 1223/2009, CMR substances of category 1A or 1B are prohibited in cosmetics unless specifically permitted. Category 2 CMR substances may be used only if assessed safe by the SCCS. Always verify current annex status and any applicable derogations before use.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex II record 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane

This page summarizes one Annex II record for 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex II conditions for 6-(2-Chloroethyl)-6-(2-methoxyethoxy)-2,5,7,10-tetraoxa-6-silaundecane, but confirm any final regulatory decision against the current official annex wording and source files.

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