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Magnesium Trisilicate
AKA “Magnesium trisilicate anhydrous, Magnesium silicate (Mg2Si3O8), Magnesium silicates magnesium trisilicate, SILICIC ACID (H4SI3O8), MAGNESIUM SALT (1:2), Mag trisil co, RefChem:55540”
Mineral
Ingredient Facts
Magnesium trisilicate
AKA: Magnesium trisilicate anhydrous, Magnesium silicate (Mg2Si3O8), Magnesium silicates magnesium trisilicate, SILICIC ACID (H4SI3O8), MAGNESIUM SALT (1:2), Mag trisil co, RefChem:55540
Mineral · Abrasive · EWG: 4
Synthetic
Mineral
Clean
A lightweight mineral powder that absorbs oil, prevents clumping, and gives products a silky, opaque finish.
Solubility Insoluble in water and alcohol
Formula
Mg2O8Si3
Mol. Weight
260.86
CAS #
14987-04-3
Form
Powder
State
Fine, white powder, free from grittiness
See origin →
Functions
Abrasive
Absorbent
Anticaking
Bulking
Opacifying
Viscosity Controlling
Physical Exfoliant
Absorbs Excess Oil
Prevents Clumping
Adds Body & Volume
Antioxidant Protection
Wound Healing
Fights Bacteria
Traditional Use
A synthetic mineral compound developed in the early 20th century as a pharmaceutical and cosmetic ingredient. Used primarily as an absorbent and anti-caking agent in powder formulations.
Skin Types
●all-skin-types
Best For
Oiliness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
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 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
→
Magnesium Trisilicate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
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
→
Magnesium Trisilicate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR