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Moumoujus

DISPERSE VIOLET 15.

Questionable CAS 62649-65-4 / HAIR DYEING

Disperse Violet 15 is a synthetic cosmetic colorant primarily employed to impart a distinct violet hue to formulations. It is important to note that this designation is not a standard INCI name; the majority of regulatory and safety information available pertains to Disperse Violet 1 (CI 61100), which is considered its functional equivalent.

Summary

Colorant

Science

Mechanism of Action

As a cosmetic colorant, the primary mechanism of action for Disperse Violet 1 (which Disperse Violet 15 references) involves the physical deposition of pigment to impart a violet color to the product or substrate, most notably in hair dyeing. It does not engage in specific biological pathways or exert active therapeutic effects on the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 5.5
0 7 14

Stability

Disperse dyes, including related violet pigments, exhibit optimal stability within a weakly acidic pH range, specifically between 4.5 and 5.5. They demonstrate high thermal resistance, remaining stable at temperatures up to 280-300°C. However, certain chemical structures within disperse dyes can be sensitive to alkaline environments and strong reducing agents, which may lead to alkali hydrolysis and degradation.

Conflicts

  • Alkali
  • Strong reducing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has deemed Disperse Violet 1 (the referenced compound) as safe for use. Clinical data indicates it was practically non-irritating in ocular studies at 5.0% and non-irritating to the skin in a 5% formulation. A hair dye formulation containing 0.033% Disperse Violet 1, applied dermally, was not carcinogenic in long-term testing. However, some mutagenic activity has been reported in one bacterial test. The Scientific Committee on Cosmetic Products and Non-Food Products (SCCNFP) initially found submitted data 'insufficient' for a comprehensive risk assessment in 2002. Subsequently, Disperse Violet 1 was specified for use as a non-oxidising hair dye agent, with a maximum concentration of 2.0% in the finished cosmetic product and 0.5% for on-head semi-permanent applications. A human repeated insult patch test identified a low sensitization risk, affecting 1-3 out of 104 subjects. It is worth noting that Disperse Violet 4, a related anthraquinone dye, is classified with skin and serious eye irritation potential.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

For precision skincare formulations, Disperse Violet 15 is deemed questionable due to its non-standard INCI nomenclature, primary function as a colorant rather than a skin-benefiting active, and a documented low but present risk of sensitization.

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