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Hair Dye

HC YELLOW NO. 6

CAS 104333-00-8
40

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A direct yellow hair dye used in semi-permanent color products. It can cause allergic reactions and several similar HC dyes have been restricted in the EU after safety reviews.

Skin benefits

  • Provides yellow shade in semi-permanent hair dyes
  • Direct dye that does not require oxidation
  • Used at low concentrations in finished products

Known concerns

  • HC dyes have variable mutagenicity and sensitization profiles
  • Aromatic amine structures can be skin sensitizers
  • Some HC dyes are restricted or banned in the EU after SCCS review
  • Possible allergic contact dermatitis from repeated exposure
  • Limited recent positive safety opinion for this specific shade

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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BASIC RED 51
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HC BLUE NO. 15
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M-AMINOPHENOL
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N,N'-BIS(2-HYDROXYETHYL)-2-NITRO-P-PHENYLENEDIAMINE
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1-Methylamino-2- nitro-5-(2,3-dihydroxy-propyloxy)- benzene
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4-AMINO-2-HYDROXYTOLUENE SULFATE
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Same plant / compound family

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HC YELLOW NO. 10
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 42
HC YELLOW NO. 11
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HC YELLOW NO. 12
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HC YELLOW NO. 13
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HC YELLOW NO. 14
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HC YELLOW NO. 15
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.