HC BLUE NO. 10
Other
Avoid
CAS Number: 173994-75-7/102767-27-1
About HC BLUE NO. 10
A synthetic HC blue dye that sits on the high-risk end of cosmetic colorants.
Detailed Analysis
This synthetic hair-dye ingredient is listed under EU Annex II for the cited cosmetic use, which means it is prohibited rather than broadly accepted in modern cosmetic safety practice. That regulatory status alone pushes the score very low, and many dyes in this class also have irritation, sensitization, or more serious toxicology concerns.
What It Does
Known Concerns
- ⚠ Banned or prohibited for the cited cosmetic use in the EU
- ⚠ Potential skin sensitization
Safety Score
Avoid
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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