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Moumoujus

HC YELLOW NO. 14.

Avoid CAS 90349-40-9 / HAIR DYEING

HC YELLOW NO. 14 is a direct dye primarily used to impart color to hair in various hair dyeing products. Its small molecular size allows it to adhere to the hair surface and, in some semi-permanent applications, diffuse into the hair shaft.

Summary

Hair Dyeing

Science

Mechanism of Action

As a direct dye, HC YELLOW NO. 14 functions by physically adhering to the external surface of the hair follicle. In certain formulations like semi-permanent hair colorants, its low molecular weight facilitates diffusion into the hair's structure, thereby delivering its color. No mechanism of action or benefit for direct application to skin is documented.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is not commonly associated with 'dusting' in skincare formulations, as its primary application is in hair colorants, not active skincare ingredients.

The Formula

Formulation

Solubility
Unknown
Optimal pH N/A
0 7 14

Stability

Specific stability characteristics were not found in the research data.

Safety

Safety Profile

CIR Status
Unknown
Sensitization risk Unknown

A specific safety assessment by the Cosmetic Ingredient Review (CIR) Expert Panel for HC YELLOW NO. 14 is currently unavailable. While the EU's SCCS has generally assessed numerous hair colorants as safe for use, this is not specific to HC YELLOW NO. 14. Notably, a related compound, HC Yellow No. 5, has been concluded safe by the CIR for hair dye use with minimal skin absorption, yet it is prohibited in Europe (listed in Annex II of the EC Cosmetics Regulation), raising a precautionary flag for related 'HC Yellow' dyes in general, particularly for dermal application.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

HC YELLOW NO. 14 is exclusively a hair dyeing agent with no documented utility or mechanism of action for skincare formulations, and its safety profile for dermal application remains insufficiently characterized, with concerns from related compounds highlighting potential risks.

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