Official EU label nameGlossary entry 27220

SOLVENT YELLOW 18

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:6407-78-9

EC:229-043-5

Ingredient index records:

SOLVENT YELLOW 18

Cosmetic functions: HAIR DYEING

CI 12740

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1 matched or reported name

SOLVENT YELLOW 18

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name SOLVENT YELLOW 18.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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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 Å²
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

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External database identifiers

EPA DTXSID:DTXSID10863784

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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