Hydrated Silica
AKA: Silica hydrate, Hydrosilicic acid, Silicon dioxide hydrate, SILICIC ACID (MART.), SILICIC ACID [MART.], Zarazyl, Zarasyl Companion
Synthetic
Clean
Silicic acid; synthetic amorphous silicon dioxide
Formula
H2O3Si
Mol. Weight
78.10
CAS #
10279-57-9, 1343-98-2, 7631-86-9, 112926-00-8, 63231-67-4
Form
Powder
Functions
Abrasive
Absorbent
Anticaking
Bulking
Opacifying
Viscosity Controlling
Physical Exfoliant
Absorbs Excess Oil
Prevents Clumping
Adds Body & Volume
Antioxidant Protection
Locks In Moisture
Reduces Inflammation
Traditional Use
Mined forms of silica have been used in skincare for centuries as gentle abrasives and oil absorbers. Developed as a modern cosmetic ingredient in the 20th century as a safer alternative to harsh mineral powders for exfoliation and mattifying.
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.
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR