Other
N-ISOPROPYL 4,5-DIAMINO PYRAZOLE SULFATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A hair-dye intermediate used at low concentrations for oxidative colour development, with generally good safety when formulated below recommended limits.
N-Isopropyl 4,5-diamino pyrazole sulfate is a pyrazole-based hair-dye intermediate used in oxidative (permanent) hair-colour formulations. The diamino pyrazole structure couples with primary intermediates like p-phenylenediamine to form azomethine dyes within the hair shaft. No EU Annex restriction or GHS hazard statements are present in available data, suggesting use within recommended concentration limits is not considered problematic. The sulfate salt improves water solubility for more even colour development in alkaline hair-dye vehicles.
Skin benefits
- Enables oxidative hair dye formation
- Water-soluble sulfate salt for even colour deposition
- Used in combination with couplers for broad colour range
Known concerns
- Contains aromatic amine structure – monitor for sensitisation
- Requires alkaline (pH 8-10) developer conditions for activation
- May cause staining of scalp or skin during application
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related others
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.