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

CAS 6407-78-9

CAS 6407-78-9 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 6407-78-9
CAS 6407-78-9PubChem CID 110846

Solvent Yellow 18

IUPAC name
4-[(2,4-dimethylphenyl)diazenyl]-5-methyl-2-phenyl-4H-pyrazol-3-one
Molecular formula
C18H18N4O
Molecular weight
306.4 g/mol
Exact mass
306.14806121 Da
XLogP3
4.0
Topological polar surface area
57.4 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
0

Also known as

C.I. Solvent yellow 184-[(2,4-dimethylphenyl)azo]-2,4-dihydro-5-methyl-2-phenyl-3h-pyrazol-3-oneUNII-L4SQI4K87SEINECS 229-043-54-((2,4-Dimethylphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneL4SQI4K87S3H-Pyrazol-3-one, 4-(2-(2,4-dimethylphenyl)diazenyl)-2,4-dihydro-5-methyl-2-phenyl-3H-Pyrazol-3-one, 4-[2-(2,4-dimethylphenyl)diazenyl]-2,4-dihydro-5-methyl-2-phenyl-
13 more reported names
RefChem:184255Solvent Yellow 18 [INCI]C.I. FOOD YELLOW 12CI 127403H-Pyrazol-3-one, 4-((2,4-dimethylphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-3H-Pyrazol-3-one, 4-[(2,4-dimethylphenyl)azo]-2,4-dihydro-5-methyl-2-phenyl-4-[(2,4-dimethylphenyl)diazenyl]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one4-((2,4-Dimethylphenyl)diazenyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-oneKLQVCADYSBUVAV-UHFFFAOYSA-NHY-D0421CS-0010472AG-690/365370634-(2,4-dimethylphenyl)azo-5-methyl-2-phenyl-4H-pyrazol-3-one
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 6407-78-9

0 total
No records found for this CAS number.

How CAS 6407-78-9 is used on this site

CAS 6407-78-9 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 6407-78-9 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.