2-(1,3-Dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.
2-(1,3-Dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one is the chemical name for Indigo (synthetic), C.I. 73000. Indigo has been used for centuries as a dye and has been used in cosmetic hair dye formulations. It is not listed in EU Annexes II or IV restrictions for colorants. However, as a color additive in hair dyes, it falls under specific EU regulations for hair dye colorants. The compound has been evaluated by the scientific committee for cosmetic safety and has acceptable use levels in oxidative hair dye formulations.
Known concerns
- May require batch certification for cosmetic use
- Specific regulations for hair dye colorants apply
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
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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.