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Potassium Silicate
AKA “Potassium water glass, Kasil, Kasil 6, Pyramid 120, RefChem:1096558, 1312-76-1, potassium orthosilicate, Potassium Silicate, Anhydrous, tetrapotassium;silicate, Pyramid K-84”
Ingredient
Ingredient Facts
Potassium silicate
AKA: Potassium water glass, Kasil, Kasil 6, Pyramid 120, RefChem:1096558, 1312-76-1, Potassium orthosilicate, Anhydrous, Tetrapotassium;silicate, Pyramid K-84
Ingredient · Anticorrosive · EWG: 3
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
See origin →
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.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
3
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
Final Report on the Safety Assessment of Potassium Silicate, Sodium Metasilicate, and Sodium Silicate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Potassium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Final report on the safety assessment of potassium silicate, sodium metasilicate, and sodium silicate.
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2005
→
Final report on the safety assessment of potassium silicate, sodium metasilicate, and sodium silicate.
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2005
→
Final report on the safety assessment of potassium silicate, sodium metasilicate, and sodium silicate.
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2005
→
Potassium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR