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

CAS 431-03-8

CAS 431-03-8 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 431-03-8
CAS 431-03-8PubChem CID 650

Butanedione

Diacetyl appears as a clear colorless liquid with a strong chlorine-like odor. Flash point 80 °F. Less dense than water. Vapors heavier than air. — CAMEO Chemicals

IUPAC name
butane-2,3-dione
Molecular formula
C4H6O2
Molecular weight
86.09 g/mol
Exact mass
86.036779430 Da
XLogP3
-1.3
Topological polar surface area
34.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

2,3-butanedionediacetylbiacetyldimethylglyoxaldimethyl diketoneDimethyl glyoxal2,3-diketobutane2,3-dioxobutane
16 more reported names
2,3-ButadioneGlyoxal, dimethyl-2,3-butandioneFEMA No. 2370AI3-03313K324J5K4HMNSC-8750CHEBI:16583Diketobutane2,3 ButanedioneRefChem:132552207-069-8butadioneDiacetyl (natural)Butan-2,3-dioneCCRIS 827
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 431-03-8

0 total
No records found for this CAS number.

How CAS 431-03-8 is used on this site

CAS 431-03-8 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 431-03-8 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.