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Moumoujus

CI 21100.

Optional CAS 5102-83-0 / COLORANT

CI 21100, also known as Pigment Yellow 13, is an organic azo pigment functioning as a cosmetic colorant. It imparts a yellow hue to products by absorbing or reflecting physical light.

Summary

Colorant

Science

Mechanism of Action

This ingredient physically interacts with light, absorbing or reflecting specific wavelengths to produce a distinct yellow color. Its primary role is to enhance the visual aesthetic of cosmetic formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

CI 21100 is stable up to 150°C in rubber and 180-200°C in plastics, though unsuitable for high-temperature engineering plastics. It exhibits moderate lightfastness, limiting its suitability to indoor applications.

Conflicts

  • strong polar solvents

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

Authorized for rinse-off cosmetics in the EU, CI 21100 is forbidden in hair dye products. There are conflicting reports regarding its irritancy, with some sources suggesting it as a potential allergen or irritant, while others classify it as 'Irritant Free'.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

CI 21100 is an optional yellow cosmetic colorant, regulated for specific uses in the EU, with currently unknown irritancy and comedogenicity data.

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