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Moumoujus

ACID RED 18 ALUMINUM LAKE.

Valuable CAS 12227-64-4 / HAIR DYEING

An insoluble scarlet-red pigment used to impart vibrant color in cosmetic formulations. It functions as a direct dye, adhering to the surface without chemical reaction.

Summary

colorant hair dyeing

Science

Mechanism of Action

This color lake provides pigmentation via dispersion, not dissolution. It physically adheres to the skin or hair surface, delivering visible color without chemically interacting with the substrate.

Research

Clinical Evidence

High confidence
Effective range ≤1.5%
Optimal

N/A

Key findings

  1. 01 SCCS/1558/15
  2. 02 SCCNFP/0792/04

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 9.5
0 7 14

Stability

Stable under normal temperatures with excellent light and heat stability. It is insoluble in water but dispersible; strong acids can strip the aluminum and release the dye.

Conflicts

  • Strong oxidizing agents
  • Strong reducing agents
  • Strong acids

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
0.5%
Sensitization risk Low

The SCCS restricts its use to 0.5% in non-oxidative hair dyes and 1.5% in oxidative hair dyes. Banned in food/cosmetics in the USA (FDA) as Ponceau 4R, but permitted in the EU as CI 16255.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

As a widely recognized colorant, Acid Red 18 Aluminum Lake is valuable for imparting vibrant red pigmentation in cosmetic formulations within regulatory limits.

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