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CAS 275-51-4

CAS 275-51-4 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 275-51-4
CAS 275-51-4PubChem CID 9231

Azulene

Azulene is a mancude carbobicyclic parent consisting of a cycloheptatriene and cyclopentadiene rings. It has a role as a volatile oil component and a plant metabolite. It is an ortho-fused bicyclic arene, a member of azulenes and a mancude carbobicyclic parent. — ChEBI

IUPAC name
azulene
Molecular formula
C10H8
Molecular weight
128.17 g/mol
Exact mass
128.062600255 Da
XLogP3
3.2
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

CyclopentacyclohepteneAzunamicBicyclo[5.3.0]decapentaeneazulenBicyclo(5.3.0)decapentaeneBicyclo(5.3.0)-deca-2,4,6,8,10-pentaene82R6M9MGLPBicyclo(5.3.0)-1,3,5,7,9-decapentaene
16 more reported names
NSC-89248CHEBI:31249RefChem:116159205-993-6EINECS 205-993-6AZULENE [MI]Azulene (JAN)Bicyclo[5.3.0]-1,5,7,9-decapentaeneAZULENE [JAN]SR-01000944574-1BICYCLO-(5.3.0)-DECA-2,4,6,8,10-PENTAENENSC 89248UNII-82R6M9MGLPAzulene (Standard)Azulene, 99%AZULENE [INCI]
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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 275-51-4

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How CAS 275-51-4 is used on this site

CAS 275-51-4 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 275-51-4 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.