Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 0 records

CAS 642-05-7

CAS 642-05-7 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 642-05-7
CAS 642-05-7PubChem CID 69502

Alloimperatorin

Alloimperatorin is a member of psoralens. — ChEBI

IUPAC name
9-hydroxy-4-(3-methylbut-2-enyl)furo[3,2-g]chromen-7-one
Molecular formula
C16H14O4
Molecular weight
270.28 g/mol
Exact mass
270.08920892 Da
XLogP3
3.9
Topological polar surface area
59.7 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
0

Also known as

PrangenidinUNII-3043NX3603NSC 301051NSC-3010513043NX36039-Hydroxy-4-(3-methyl-2-butenyl)-7H-furo(3,2-g)(1)benzopyran-7-one5-Benzofuranacrylic acid, 6,7-dihydroxy-4-(3-methyl-2-butenyl)-, .delta.-lactone7H-FURO(3,2-G)(1)BENZOPYRAN-7-ONE, 9-HYDROXY-4-(3-METHYL-2-BUTEN-1-YL)-
16 more reported names
9-hydroxy-4-(3-methylbut-2-enyl)furo(3,2-g)chromen-7-oneRefChem:110811ALLOIMPERATORIN [INCI]5-Benzofuranacrylic acid, 6,7-dihydroxy-4-(3-methyl-2-butenyl)-, delta-lactoneKDXVVZMYSLWJMA-UHFFFAOYSA-N9-hydroxy-4-(3-methylbut-2-en-1-yl)-7H-furo[3,2-g]chromen-7-one7H-Furo[3,2-g][1]benzopyran-7-one, 9-hydroxy-4-(3-methyl-2-butenyl)-allo-imperatorin7H-Furo(3,2-g)(1)benzopyran-7-one, 9-hydroxy-4-(3-methyl-2-butenyl)-CHEBI:2599HY-N2623TN1369EBC-617263DA-60930MS-23822CS-0023030
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 642-05-7

0 total
No records found for this CAS number.

How CAS 642-05-7 is used on this site

CAS 642-05-7 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 642-05-7 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.