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CAS 623-51-8

CAS 623-51-8 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 623-51-8
CAS 623-51-8PubChem CID 12185

Ethyl Thioglycolate

Based on the available data, the CIR Expert Panel concluded that ... Ethyl Thioglycolate is safe for use in hair straighteners, permanent waves, tonics, dressings, and so forth, wave sets, other non-coloring hair products, and hair dyes and colors, as described in this safety assessment, at concentrations up to 15.2% (as Thioglycolic Acid). Hairdressers should avoid skin contact and minimize consumer skin exposure. — Cosmetic Ingredient Review (CIR)

IUPAC name
ethyl 2-sulfanylacetate
Molecular formula
C4H8O2S
Molecular weight
120.17 g/mol
Exact mass
120.02450067 Da
XLogP3
0.8
Topological polar surface area
27.3 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
3
Covalent units
1
Defined stereocentres
0

Also known as

Ethyl 2-mercaptoacetateEthyl mercaptoacetateUSAF EK-2070Thioglykolsaeure-aethylesterNSC 8834Ethyl .alpha.-mercaptoacetateAcetic acid, 2-mercapto-, ethyl ester2-mercaptoacetic acid ethyl ester
16 more reported names
UNII-Z5SD8DD6CPZ5SD8DD6CPEINECS 210-800-3Thioglykolsaeure-aethylester [German]BRN 0605581AI3-23030NSC-8834Ethyl alpha-mercaptoacetateETHOXYCARBONYLMETHANETHIOL4-03-00-00616 (Beilstein Handbook Reference)ACETIC ACID,MERCAPTO,ETHYL ESTERRefChem:139061ThioglykolsaeureaethylesterETHYL THIOGLYCOLATE [INCI]Acetic acid, mercapto, ethyl esterAcetic acid, 2mercapto, ethyl ester
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 623-51-8

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How CAS 623-51-8 is used on this site

CAS 623-51-8 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 623-51-8 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.