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Moumoujus

ACID ORANGE 3.

Avoid CAS 6373-74-6 / HAIR DYEING

Acid Orange 3 is a synthetic nitro dye primarily utilized as a direct colorant in hair products. It imparts an orange hue by physically absorbing onto the hair shaft.

Summary

colorant hair dyeing

Science

Mechanism of Action

This non-reactive dye adheres to the hair's cuticle and outer cortex through physical absorption. It does not chemically react with keratin, distinguishing it from reactive hair dyes.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Acid Orange 3 is highly soluble in water and ethanol, with solubility increasing significantly at higher temperatures. It may precipitate in strong acidic conditions.

Conflicts

  • strong sulfuric acid
  • copper ions
  • iron ions

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
0.2%
Sensitization risk Low

While the CIR found it non-carcinogenic and safe for hair dye at ≤ 0.2%, the EU prohibits its use due to concerns over aromatic amine impurities and a low safety margin.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

As a direct hair dye lacking any demonstrated skincare benefits and facing regulatory restrictions in some regions, Acid Orange 3 is not suitable for precision skincare applications.

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