Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

BASIC BLUE 47.

Optional CAS 67905-56-0 / HAIR DYEING

A synthetic cationic anthraquinone dye utilized primarily as a direct colorant in cosmetic formulations. It is engineered to provide high-intensity blue hues through surface-level ionic deposition rather than biological interaction with the skin tissue.

Summary

colorant

Science

Mechanism of Action

As a cationic molecule, Basic Blue 47 carries a positive charge that allows it to form ionic bonds with the negatively charged carboxyl groups found on the surface of keratin. This results in a temporary surface-level coating of the skin or hair without significant penetration of the stratum corneum or hair shaft.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–2%
Optimal

0.67%

Key findings

  1. 01 Evaluation of color fastness and keratinous fiber deposition (ACS Omega, 2025).
  2. 02 Toxicological screening for skin sensitization and dermal absorption profiles (NC State Repository).

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.05%
Red flag below
0.01%

Because Basic Blue 47 is a potent dye, visible results are achieved at very low concentrations; however, its inclusion is purely aesthetic and provides no physiological skin benefits.

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 9
0 7 14

Stability

Demonstrates exceptional thermal stability up to 120°C and maintains color integrity in high-acid environments. It features high lightfastness and resistance to washing once deposited on fibers.

Synergies

  • Non-ionic surfactants
  • Cationic conditioning agents

Conflicts

  • Anionic surfactants (e.g., Sodium Lauryl Sulfate)
  • Anionic thickeners (e.g., Carbomer)
  • Negatively charged polymers

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
2%
Sensitization risk Low

Classified as an Eye Irritant Category 2 (H319) by ECHA. While allowed in the EU, its use is typically limited to rinse-off products to minimize prolonged exposure.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A stable and effective aesthetic colorant with no therapeutic skin benefits and potential charge-based formulation incompatibilities.

Related

Similar Ingredients

Finding similar ingredients…