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ALUMINUM ZIRCONIUM TETRACHLOROHYDREX PG.

Essential CAS 235433-35-9 / DEODORANT

This ingredient effectively reduces underarm wetness and controls odor, offering up to 72 hours of protection. It is recognized for its high efficacy as a clinical-strength antiperspirant in various cosmetic formulations.

antiperspirant astringent deodorant

Science

It forms a temporary gel-like plug within sweat ducts by reacting with moisture and proteins, physically blocking perspiration release. Its complex structure, including propylene glycol, enhances penetration and barrier stability compared to simpler aluminum salts.


Research

High confidence
Effective range 15.4–20%
Optimal

20%

Key findings

  1. 01 At 20%, it provides up to 72 hours of sweat and odor protection by significantly reducing underarm wetness, qualifying as 'Clinical Strength'.
  2. 02 At 15.4%, it effectively acts as an astringent and deodorant in stick formulations, ensuring a dry feel and odor control for daily use.

Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH 3 – 5
0 7 14

Stability

Highly stable in suspension and silicone-based systems. Propylene glycol enhances transparency in gels and improves skin feel.

Conflicts

  • Incompatible with aerosol delivery systems
  • May react with strong oxidizers
  • Can be deactivated by high concentrations of certain water-soluble inorganic salts

Safety

CIR Status
Safe as used
Max tested
20%
Sensitization risk Low

FDA and Health Canada limit its concentration to 20% on an anhydrous basis. It is prohibited in aerosols due to inhalation concerns, with low dermal absorption (0.012%) confirmed for non-sprayable products.


Your Skin

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

Our Assessment

Essential

This highly effective antiperspirant is essential for formulations targeting significant sweat and odor reduction, with a robust safety profile within regulatory limits.


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