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CAS 434-16-2

CAS 434-16-2 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 434-16-2
CAS 434-16-2PubChem CID 439423

7-Dehydrocholesterol

Cholesta-5,7-dien-3beta-ol is a Delta(5),Delta(7)-sterol, a 3beta-hydroxy-Delta(5)-steroid, a 3beta-sterol and a cholestanoid. It has a role as a mouse metabolite and a human metabolite. — ChEBI

IUPAC name
(3S,9S,10R,13R,14R,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol
Molecular formula
C27H44O
Molecular weight
384.6 g/mol
Exact mass
384.339216023 Da
XLogP3
8.0
Topological polar surface area
20.2 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
7

Also known as

Provitamin D3Cholesta-5,7-dien-3beta-ol7,8-Didehydrocholesterol(3beta)-Cholesta-5,7-dien-3-ol7-DHC5,7-Cholestadien-3-beta-olBK1IU07GKFcholesta-5,7-dien-3 beta-ol
16 more reported names
NSC-18159CHEBI:17759Cholesta-5,7-dien-3-ol, (3beta)-provitamin D(3)(3S,9S,10R,13R,14R,17R)-10,13-dimethyl-17-((2R)-6-methylheptan-2-yl)-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta(a)phenanthren-3-ol10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta(a)phenanthren-3-ol10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-olRefChem:105986207-100-5Dehydrocholesterol7-DehydrocholesterinDehydrocholesterindelta7-Cholesteroldelta5,7-CholesterolProvitamin D(sub 3)(3beta)-7-Dehydro Cholesterol
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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 434-16-2

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How CAS 434-16-2 is used on this site

CAS 434-16-2 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 434-16-2 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.