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CAS 56-53-1

CAS 56-53-1 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 56-53-1
CAS 56-53-1PubChem CID 448537

Diethylstilbestrol

IUPAC name
4-[(E)-4-(4-hydroxyphenyl)hex-3-en-3-yl]phenol
Molecular formula
C18H20O2
Molecular weight
268.3 g/mol
Exact mass
268.146329876 Da
XLogP3
5.1
Topological polar surface area
40.5 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

StilboestrolDistilbeneEstrobeneStilbetinStilboestroformAntigestilEstromeninVagestrol
16 more reported names
DietilestilbestrolComestrolDomestrolGrafestrolIscovescoMenostilbeenMilestrolOestrogenineOestromeninOestromensylOestromieninPalestrolSexocretinStilbestroneStilboefralStilbofolin
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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 56-53-1

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How CAS 56-53-1 is used on this site

CAS 56-53-1 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 56-53-1 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.