Potassium Metaphosphate

AKA: 7790-53-6, Metaphosphoric acid potassium salt, Potassium oxophosphinate, Monopotassium metaphosphate, Potassium metaphosphate (kpo3), CHEBI:148438
Synthetic
Cleanser
Not Clean
OriginPotassium metaphosphate is synthesized from phosphorus pentoxide and potassium hydroxide or potassium carbonate. It is produced through high-temperature fusion and condensation of phosphate precursors followed by potassium salt formation.
Potassium salt of metaphosphoric acid
Solubility 1 g dissolves in 100 ml of a 1 in 25 solution of sodium acetate
Formula
KO3P
Mol. Weight
118.07
CAS #
7790-53-6
Form
Powder
State
Fine white powder or crystals or colourless glassy platelets
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing Surfactant
Removes Impurities
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-onNot reported
Rinse-off0.11%
0%50%100%
CIR reported use · 2015 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR