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Moumoujus

ZINC HEXAMETAPHOSPHATE.

Insufficient Data CAS 13566-15-9 / ANTICORROSIVE, BUFFERING, CHELATING

Zinc Hexametaphosphate is a zinc polyphosphate complex that acts as an anticorrosive, buffering, and chelating agent. It helps stabilize formulations and can interact with proteins at certain pH levels.

Summary

Anticorrosive Buffering Chelating

Science

Mechanism of Action

It functions by chelating metal ions, buffering pH, and preventing corrosion. Its polyphosphate nature allows it to become insoluble with proteins below pH 7, potentially leading to precipitation.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 7.5
0 7 14

Stability

Zinc polyphosphate complexes can become insoluble at pH 5.5 or above, or above 7.0-7.5, and also in the presence of proteins below pH 7. It is prone to hydrolysis in warm, acidic, or alkaline solutions.

Conflicts

  • Warm water (hydrolysis)
  • Acidic solutions (hydrolysis)
  • Alkaline solutions (hydrolysis)
  • Proteins (precipitation risk)

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Unknown

The CIR Expert Panel found zinc hexametaphosphate, and other zinc salts, safe in cosmetics when formulated to be non-irritating. Specific dermal application concentrations were not detailed by SCCS, which focused on oral products.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Insufficient Data

While recognized for its formulation benefits, there is insufficient specific dermal efficacy and concentration data to fully assess its direct value in skincare.

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