Potassium Silicate

AKA: Potassium water glass, Kasil, Kasil 6, Pyramid 120, 1312-76-1, Potassium orthosilicate, Anhydrous, Tetrapotassium;silicate, Pyramid K-84
Synthetic
Not Clean
Silicic acid, potassium salt
Solubility SOL IN COLD & HOT WATER; INSOL ALC /META & TETRASILICATE/
Formula
K4O4Si
Mol. Weight
248.48
CAS #
1312-76-1
Form
Powder
State
Dry Powder, Liquid; Liquid
Functions
Anticorrosive
Prevents Corrosion
Anti-Aging Benefits
Antioxidant Protection
Locks In Moisture
Prevents product degradation
Traditional Use
A mineral salt developed in the 19th century for industrial applications. Used in cosmetics as a pH buffer and firming agent with no significant traditional skincare use.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing
🛡️Safety-assessed3 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR