murphyZinc Hexametaphosphate
AKA: Zinc dimetaphosphate, 13566-15-9, Metaphosphoric acid (HPO3), Zinc salt, Metaphosphoric acid (Zn(PO3)2), Zinc salt (2:1)
Synthetic
Chelating Agent
Not Clean
OriginSynthesized from zinc oxide and phosphoric acid or phosphate salts through acid-base reactions. Produced by heating and condensing phosphoric acid with zinc compounds to form the polymeric metaphosphate structure.
The CIR Expert Panel concluded that the following 27 zinc salts are safe in cosmetics in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating...Zinc Hexametaphosphate...
Formula
O6P2Zn
Mol. Weight
223.30
CAS #
13566-15-9
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Anticorrosive
Buffering
Chelating
Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.
Prevents Corrosion
Stabilizes pH
Removes Metal Ions
Fights Bacteria
Anti-Aging Benefits
Reduces Inflammation
Prevents product degradation
Maintains optimal pH
Binds metal ions
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR