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Moumoujus

SOLVENT ORANGE 1.

Avoid CAS 2051-85-6 / HAIR DYEING

Solvent Orange 1 is a synthetic azo dye primarily used in industrial applications for its coloring properties. Its severe safety profile, encompassing high irritancy, sensitization potential, and suspected carcinogenicity, renders it entirely unsuitable for precision skincare formulations.

Summary

Colorant

Science

Mechanism of Action

The primary function of Solvent Orange 1 is to impart an orange color. However, as an azo dye, it possesses the potential for metabolic breakdown in vivo into carcinogenic aromatic amines. Additionally, it directly acts as a potent irritant and sensitizer upon skin exposure.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Solvent Orange 1 is a colorant with no reported efficacy benefits in skincare; therefore, 'dusting' and associated thresholds are not applicable for this ingredient.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This dye is soluble in organic solvents such as ethanol and ether (yielding a yellow solution) and exhibits slight solubility in water. While general solvent dyes are noted for stability across a wide pH spectrum, Solvent Orange 1 shows distinct color alterations in highly concentrated sulfuric acid and hot sodium hydroxide solutions.

Conflicts

  • Strong acids
  • Strong bases

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
0%
Sensitization risk High

Solvent Orange 1 is classified as a hazardous substance, posing risks of cancer, severe irritation to skin and eyes, and sensitization by skin contact. Ingestion of even small amounts (less than 150 grams) can be fatal. It is known to cause skin inflammation and can exacerbate pre-existing dermatitis. Regulatory bodies like the FDA have previously removed related 'Orange' dyes from approved cosmetic lists due to similar carcinogenicity concerns. Therefore, its use is strongly contraindicated for any skin-contact cosmetic product.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Solvent Orange 1 is a highly hazardous ingredient with significant risks including carcinogenicity, severe skin irritation, and sensitization, rendering it unequivocally unsuitable for any precision skincare formulation.

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