Ingredient

HYDROXYPYRIDINONE

⚠ EU Restricted

Identification

CAS Number 822-89-9
EINECS / EC 212-506-0
CosIng Ref 34551
Chemical Name 1-hydroxypyridin-2-one
IUPAC Name
Formula C5H5NO2
Mol. Weight 111.1 g/mol
SMILES C1=CC(=O)N(C=C1)O
InChIKey SNUSZUYTMHKCPM-UHFFFAOYSA-N

Function & Classification

Primary Function SURFACTANT - FOAM BOOSTING
Secondary Functions HAIR DYEING

EU Regulatory Status

🇪🇺
⚠ Restricted — EU Reg. 1223/2009 II/1249 (hypyridinone and its salts, when used as a substance in hair dye products)

Safety Profile

No toxicology data available yet for this ingredient.

Check SCCS opinions or CIR reports for published safety assessments.

NOAEL · Dermal Absorption % · Sensitization

Formulation Guidelines

Usage level, pH range, solubility and addition phase not yet available.

Usage Level % · Addition Phase · Solubility

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Documents

External Resources