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ZIRCONIUM CHLOROHYDRATE.

Valuable CAS 18428-88-1 / ASTRINGENT

A metallic salt primarily utilized as an active ingredient in antiperspirants. It effectively reduces perspiration and provides a deodorant effect by forming temporary plugs within sweat ducts.

antiperspirant astringent deodorant

Science

Zirconium Chlorohydrate complexes diffuse into sweat pores, creating a colloidal or gel-like plug that temporarily obstructs sweat release. These plugs are naturally expelled, and the ingredient also possesses water-absorbing properties and antibacterial effects.


Research

High confidence
Effective range ≤20%
Optimal

N/A

Key findings

  1. 01 FDA allows inclusion in antiperspirants up to 20%, demonstrating efficacy in perspiration reduction.
  2. 02 Antiperspirants containing these complexes achieve 20% to 60% sweat reduction, with higher concentrations and lower pH increasing efficacy.
  3. 03 An anhydrous form provides prescription-strength efficacy with significantly less irritation compared to aluminum chloride.

Transparency

Not commonly dusted

This ingredient serves as a primary active agent for antiperspirant function, not as an inert filler or for texture modification.


The Formula

Solubility
Water
Optimal pH 2.5 – 5
0 7 14

Stability

Optimal antiperspirant efficacy is observed at acidic pH values, typically buffered between 2.5 and 5.0. Higher concentrations combined with a lower pH value generally enhance its effectiveness.

Conflicts

  • Irritated or damaged skin
  • Aerosol dispensers (due to inhalation risk)

Safety

CIR Status
Deferred evaluation
Max tested
20%
Sensitization risk Unknown

The FDA approves its use in OTC antiperspirants up to 20%. While generally safe within limits, it is a suspected endocrine disruptor and carcinogen, and should not be used in aerosol sprays due to respiratory concerns.


Your Skin

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

Our Assessment

Valuable

Zirconium Chlorohydrate is a valuable, FDA-approved antiperspirant effective in reducing sweat, but its use requires careful consideration due to potential health concerns and application restrictions.


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