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Moumoujus

PIGMENT RED 57.

Optional CAS 5858-81-1 / COLORANT

Pigment Red 57 is a vibrant red colorant utilized across diverse cosmetic applications, including lip products, blushes, and semi-permanent hair dyes. Its primary function is to impart an aesthetic red hue to skin, nails, or hair by absorbing and reflecting light, rather than providing active treatment benefits.

Summary

Colorant

Science

Mechanism of Action

This ingredient functions principally as a cosmetic colorant. It bestows a red coloration upon cosmetic products, skin, nails, and hair through the physical processes of light absorption and reflection.

Research

Clinical Evidence

High confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 The Scientific Committee on Consumer Safety (SCCS) concluded in 2012 that Pigment Red 57, when used as a direct dye in non-oxidative semi-permanent hair dye formulations at an on-head concentration up to 0.4%, does not pose a risk to consumer health.
  2. 02 An SCCNFP opinion indicated that Pigment Red 57, at a 10% concentration in propylene glycol, did not induce skin irritation (grade 0) and was not anticipated to be comedogenic in rabbit models, suggesting favorable skin compatibility in certain applications.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 9
0 7 14

Stability

Pigment Red 57 demonstrates stability in water, with 97% recovery over 7 days at room temperature in the absence of light (at 0.5% w/v). It has also been reported as stable in cosmetic formulations for up to 7 months at 25ºC, though comprehensive supporting data was noted as incomplete. Care should be taken in highly alkaline environments, as metal ion substitution may lead to thickening of the formulation.

Conflicts

  • Alkaline environments (potential for thickening due to metal ion substitution)

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
0.4%
Sensitization risk Low

The Scientific Committee on Consumer Safety (SCCS) concluded in 2012 that Pigment Red 57 is safe for consumer health when used as a direct dye in non-oxidative hair dye formulations at a maximum on-head concentration of 0.4%. However, the SCCS recommended further assessment for its safety when used as a colorant in other cosmetic products due to potential for additional consumer exposure. Pigment Red 57, also known as D & C Red No. 6, is approved by the FDA for use in pharmaceuticals and cosmetics but is restricted for use in cosmetics around the eyes. Conflicting irritation data exists: an SCCNFP opinion found no skin irritation at 10% in rabbit studies, while another animal study noted mild irritation to rabbit skin and eyes at 10% and slight irritation at 1% in an HET-CAM test.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

Pigment Red 57 is an optional ingredient, primarily valued for its vibrant red coloring properties in cosmetic formulations, with generally acceptable safety parameters when utilized within established regulatory guidelines, despite some conflicting irritation data.

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