murphySodium Metasilicate
AKA: SODIUM SILICATE, Waterglass, Sodium siliconate, Sodium sesquisilicate, Sodium silicate glass, Sodium water glass, Britesil, Carsil, Dryseq, Sikalon
Synthetic
Chelating Agent
Not Clean
OriginProduced from sodium oxide and silicon dioxide through high-temperature fusion or alkaline hydrolysis reactions. The resulting compound is crystallized or dissolved into liquid form for cosmetic formulation use.
The Expert Panel for Cosmetic Ingredient Safety concluded that the following 24 silicate ingredients are safe in cosmetics in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating, with the exception that the available data are insufficient to make a determination of safety for the use of naturally-sourced (i.e., mined) silicate ingredients in products that may be incidentally inhaled: Sodium Metasilicate.
Solubility VERY SOL IN COLD & HOT WATER; SOLUBLE IN DILUTE SODIUM HYDROXIDE; INSOLUBLE IN ALCOHOL, ACIDS /NONAHYDRATE/
Formula
Na2O3Si
Mol. Weight
122.06
CAS #
6834-92-0
Form
Powder
State
Sodium silicate appears as a powdered or flaked solid substance. Strong irritant to skin, eyes, and mucous membranes. May be toxic by ingestion. Concentrated aqueous solutions used as a glue.
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
Anti-Aging Benefits
Antioxidant Protection
Locks In Moisture
Prevents product degradation, Maintains optimal pH, Binds metal ions
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.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Mixed Skin Irritation Results
12 studies / 9 irritating / 3 mixed / reactions slight to corrosive (CIR 335 and 808)
Eye Irritant in Testing
2 studies / 2 irritating / reactions corrosive (CIR 335 and 808)
Mixed Sensitization Results
1 study / 1 mixed (CIR 335)
Concentration Guide
Leave-on0.001%
Rinse-off1.2–15%
0%50%100%
CIR reported use · 2018 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR