Ingredient

4,5-Diamino-1-Methylpyrazole HCL

✓ EU Allowed

Identification

CAS Number 20055-01-0
CosIng Ref 41699
Chemical Name 1-methylpyrazole-4,5-diamine;sulfuric acid
IUPAC Name
Formula C4H10N4O4S
Mol. Weight 210.21 g/mol
SMILES CN1C(=C(C=N1)N)N.OS(=O)(=O)O
InChIKey CIMLJTZGZLWBJY-UHFFFAOYSA-N

Function & Classification

Primary Function Hair Dyeing
Origin Synthetic
Category Colorants & Pigments

EU Regulatory Status

🇪🇺
✓ Allowed — EU Reg. 1223/2009 II/1217

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

Suppliers & Documents

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Documents

External Resources