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Hydrated Silica
AKA “Silica hydrate, Hydrosilicic acid, Silica, hydrated, Silicon dioxide hydrate, Y6O7T4G8P9, SILICIC ACID (MART.), SILICIC ACID [MART.], Zarazyl, Zarasyl Companion”
Ingredient
Ingredient Facts
Hydrated silica
AKA: Silica hydrate, Hydrosilicic acid, Silicon dioxide hydrate, Y6O7T4G8P9, SILICIC ACID (MART.), SILICIC ACID [MART.], Zarazyl, Zarasyl Companion
Ingredient · Abrasive · EWG: 2
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
See origin →
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
EWG
2
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
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Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of borosilicate glasses as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of silylates and surface-modified siloxysilicates.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of silylates and surface-modified siloxysilicates.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Safety assessment of silylates and surface-modified siloxysilicates.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2013
→
Amended Safety Assessment of Silicates as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Amended Safety Assessment of Synthetically Manufactured Amorphous Silica and Hydrated Silica as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of Aluminum Silicate, Calcium Silicate, Magnesium Aluminum Silicate, Magnesium Silicate, Magnesium Trisilicate, Sodium Magnesium Silicate, Zirconium Silicate, Att
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of Potassium Silicate, Sodium Metasilicate, and Sodium Silicate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of Silica, Alumina Magnesium Metasilicate, Aluminum Calcium Sodium Silicate, Aluminum Iron Silicates, Hydrated Silica and Potassium Aluminum Silicate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Safety Assessment of Borosilicate Glasses as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Safety Assessment of Silylates and Surface-Modified Siloxysilicates
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Alumina Magnesium Metasilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Aluminum Calcium Sodium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Aluminum Iron Calcium Magnesium Germanium Silicates
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Aluminum Iron Calcium Magnesium Zirconium Silicates
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Aluminum Iron Silicates
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Aluminum Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Ammonium Silver Zinc Aluminum Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Calcium Magnesium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Calcium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Calcium Sodium Borosilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Calcium Titanium Borosilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Dimethicone/Vinyltrimethylsiloxysilicate Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Dimethiconol/Methylsilanol/Silicate Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Dimethiconol/Silica Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Hydrated Silica
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Lithium Magnesium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Lithium Magnesium Sodium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Magnesium Aluminometasilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Magnesium Aluminum Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Magnesium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Magnesium Trisilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Polymethylsilsesquioxane/Trimethylsiloxysilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Potassium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
silica
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Silica dimethyl silylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Silica Silylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Silver Borosilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Sodium Magnesium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Sodium Metasilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Sodium Potassium Aluminum Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Sodium Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Sodium Silver Aluminum Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Trifluoropropyldimethyl/trimethylsiloxysilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Trimethylsiloxysilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Trimethylsiloxysilicate/Dimethicone Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Trimethylsiloxysilicate/Dimethiconol Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Vinyldimethyl/Trimethylsiloxysilicate Stearyl Dimethicone Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Vinyldimethyl/Trimethylsiloxysilicate/Dimethicone Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Zinc Borosilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Zinc Silicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Final report on the safety assessment of aluminum silicat...
Amy R Elmore
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
Final report on the safety assessment of aluminum silicate, calcium silicate, magnesium aluminum silicate, magnesium silicate, magnesium trisilicate,
Elmore AR, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2003
→
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
→
Alumina Magnesium Metasilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Aluminum Calcium Sodium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Aluminum Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Calcium Aluminum Borosilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Calcium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Calcium Sodium Borosilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Calcium Titanium Borosilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Dimethicone/Vinyltrimethylsiloxysilicate Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Hydrated Silica
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Lithium Magnesium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Lithium Magnesium Sodium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Magnesium Aluminum Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Magnesium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Magnesium Trisilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Potassium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Silica dimethyl silylate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Silica Silylate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Sodium Magnesium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Sodium Metasilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Sodium Potassium Aluminum Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Sodium Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Sodium Silver Aluminum Silicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Trifluoropropyldimethyl/trimethylsiloxysilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Trimethylsiloxysilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Trimethylsiloxysilicate/Dimethicone Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Trimethylsiloxysilicate/Dimethiconol Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Misconceptions regarding the pathogenicity of silicas and silicates.
Feigin DS
Journal of thoracic imaging, 1989
→
Studies of prophylaxis pastes containing sodium-potassium aluminum silicate and fluoride.
Putt MS, Kleber CJ, Muhler JC
Journal of dental research, 1979
→
The preparation of lactoferrin/magnesium silicate lithium injectable hydrogel and application in promoting wound healing.
Wang B, Zhao J, Lu W, Ma Y, Wang X et al.
International journal of biological macromolecules, 2022
→
The preparation of lactoferrin/magnesium silicate lithium injectable hydrogel and application in promoting wound healing.
Wang B, Zhao J, Lu W, Ma Y, Wang X et al.
International journal of biological macromolecules, 2022
→
Composite Aerogel Scaffolds Containing Flexible Silica Nanofiber and Tricalcium Phosphate Enable Skin Regeneration.
Wang X, Yuan Z, Shafiq M, Cai G, Lei Z et al.
ACS applied materials & interfaces, 2024
→
Spindle-Like Zinc Silicate Nanoparticles Accelerating Innervated and Vascularized Skin Burn Wound Healing.
Zhang H, Ma W, Ma H, Qin C, Chen J et al.
Advanced healthcare materials, 2022
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR