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Moumoujus

HC VIOLET NO. 4.

Insufficient Data / COLORANT

HC Violet No. 4 is a synthetic violet dye, primarily inferred for use as a hair colorant. Comprehensive data regarding its specific properties and effects on human skin, as well as its safety profile in cosmetic applications, are extremely limited.

Summary

Colorant

Science

Mechanism of Action

The precise mechanism of action for HC Violet No. 4 on skin remains largely undetermined. However, structurally related Basic Violet dyes (e.g., Basic Violet 1, 3, and 4), which feature quaternary ammonium ions, are generally predicted to exhibit a slow rate of penetration through the epidermal barrier.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Unknown
Optimal pH N/A
0 7 14

Stability

Specific stability data for HC Violet No. 4 are unavailable. Based on related compounds like HC Yellow No. 4 and HC Violet No. 2, which are secondary amines, there is a potential for nitrosation. Therefore, this ingredient should ideally not be co-formulated with nitrosating substances, and any residual nitrosamine content should be strictly maintained below 50 ppb.

Conflicts

  • Nitrosating substances

Safety

Safety Profile

CIR Status
Insufficient data
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed the data for related Basic Violet dyes (1, 3, and 4) insufficient to ascertain their safety in cosmetic products, primarily due to concerns regarding carcinogenic potential. Information on HC Violet No. 4 itself is scarce and frequently confused with Basic Violet 4 or HC Violet No. 2. A complete safety assessment for these dyes would necessitate robust dermal absorption data and a thorough risk assessment. Currently, no cosmetic uses or concentration limits are reported for Basic Violet 1, 3, or 4.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Insufficient Data

Due to a profound lack of specific data regarding its mechanism, safety, and efficacy for skin, combined with significant safety concerns for related compounds, HC Violet No. 4 is not recommended for precision skincare formulations.

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