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Moumoujus

BISMUTH CITRATE.

Insufficient Data CAS 813-93-4 / BUFFERING, CHELATING, HAIR DYEING

Bismuth Citrate is a synthetically produced crystalline salt primarily approved by the FDA as a color additive for hair on the scalp. It also functions in cosmetic formulations as a pH regulator and chelating agent.

Summary

Hair dyeing pH regulator Chelating

Science

Mechanism of Action

As a hair colorant, Bismuth Citrate imparts color to the hair. In other cosmetic applications, it helps stabilize pH levels and chelates metal ions, contributing to product stability and appearance.

Research

Clinical Evidence

Low confidence
Effective range 0.5–2%
Optimal

N/A

Key findings

  1. 01 FDA approval for hair coloring on the scalp at concentrations between 0.5% and 2.0%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Bismuth Citrate is stable under normal ambient conditions, decomposing above 300 °C. Its solubility increases in acidic conditions.

Conflicts

  • strong acids
  • strong bases
  • strong oxidizers

Safety

Safety Profile

CIR Status
Deferred evaluation
Max tested
2%
Sensitization risk Low

The FDA approves Bismuth Citrate for scalp hair coloring up to 2.0%, but not for the eye area. The EU does not permit its use as a colorant due to inadequate safety data, according to the SCCS.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Insufficient Data

While approved for hair coloring, there is insufficient clinical data to support Bismuth Citrate's efficacy or safety for direct topical skincare benefits.

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