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CAS 5561-99-9

CAS 5561-99-9 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 5561-99-9
CAS 5561-99-9PubChem CID 5282768

cis-11-Eicosenoic acid

(11Z)-icos-11-enoic acid is an icosenoic acid having a cis- double bond at position 11. It has a role as a plant metabolite and a human metabolite. It is a conjugate acid of a gondoate. — ChEBI

IUPAC name
(Z)-icos-11-enoic acid
Molecular formula
C20H38O2
Molecular weight
310.5 g/mol
Exact mass
310.287180451 Da
XLogP3
7.6
Topological polar surface area
37.3 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

gondoic acid11Z-eicosenoic acid(Z)-eicos-11-enoic acidcis-Delta11-eicosenoic acid20:1(n-9)CHEBI:32425Cis-icos-11-enoicRefChem:37395
16 more reported names
Fatty Acid 20:1 n-9C20:1 n-9 ciscis-gondoic acid(11Z)-icos-11-enoic acid(11Z)-Icosenoic acid(11Z)-Eicosenoic acid11-Icosenoic acid(Z)-Icosa-11-enoic acid(11Z)-11-Eicosenoic acidcis-11-icosenoic acid11-cis-eicosenoic acidFA 20:1UNII-UDX6WPL94Tcis-11-Icosenoate11(Z)-eicosenoateUDX6WPL94T
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 5561-99-9

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How CAS 5561-99-9 is used on this site

CAS 5561-99-9 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 5561-99-9 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.