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Moumoujus

BASIC BLUE 6.

Avoid CAS 966-62-1 / HAIR DYEING

A cationic oxazine dye primarily utilized in industrial and laboratory settings for its intense pigmentation. While it exhibits high affinity for keratinous surfaces, it is increasingly scrutinized due to regulatory restrictions in topical applications.

Summary

hair dyeing

Science

Mechanism of Action

As a positively charged (cationic) molecule, it bonds via electrostatic attraction to negatively charged biological substrates like keratin. In laboratory environments, it functions as a redox mediator and intercalating agent, meaning it can insert itself between DNA base pairs.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is not a standard skincare active and is generally avoided in legitimate cosmetic formulations due to its status as a prohibited substance in major markets.

The Formula

Formulation

Solubility
Water
Optimal pH 2.5 – 7
0 7 14

Stability

Maintains stability in acidic to neutral environments; however, it is highly reactive and prone to decolorization when exposed to strong reducing agents or specific metal alloys.

Conflicts

  • Anionic surfactants
  • Strong oxidizing agents
  • Strong reducing agents

Safety

Safety Profile

CIR Status
Not reviewed
Pregnancy
Caution
Sensitization risk Moderate

Listed under Annex II of the EU Cosmetics Regulation, meaning it is strictly prohibited for use in cosmetic products. Safety Data Sheets categorize it as a Category 2 irritant for both skin and eyes.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Due to its status as a prohibited substance in the EU and its potential as a skin irritant, Basic Blue 6 has no place in a precision skincare regimen.

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References

Sources