Potassium Polyphosphate

AKA: Polyphosphoric acid potassium salt

Synthetic

Chelating Agent

Clean

Polyphosphoric acid, potassium salts

CAS #

68956-75-2

Form

Powder

Functions

Chelating

Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.

Removes Metal Ions

Binds metal ions

Traditional Use

A synthetic salt developed as a water softening and chelating agent in the 20th century. Used in cosmetics to improve product stability and prevent mineral interference.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR