Sodium Magnesium Aluminum Silicate
AKA “Silicic acid, aluminum magnesium sodium salt, EINECS 234-919-5, EC 234-919-5, RefChem:182980, DTXCID601030977, aluminum;magnesium;sodium;dioxido(oxo)silane, Sodium magnesium aluminosilicate
Mineral
Ingredient Facts
Sodium magnesium aluminum silicate
AKA: Silicic acid, Aluminum magnesium sodium salt, EINECS 234-919-5, EC 234-919-5, RefChem:182980, DTXCID601030977, Aluminum;magnesium;sodium;dioxido(oxo)silane, Sodium magnesium aluminosilicate
Mineral · Absorbent · EWG: 4
Synthetic
Mineral
Clean
A natural mineral powder that absorbs excess oil and moisture, helping keep makeup in place and skin looking matte throughout the day.
Formula
AlMgNaO9Si3
Mol. Weight
302.53
CAS #
12040-43-6
Form
Powder
State
Dry Powder
See origin →
Functions
Absorbent
Viscosity Controlling
Anti-caking
Anti-Inflammatory
Antimicrobial
Fights Acne
Absorbs excess oil
Traditional Use
Developed in the 20th century as a modern clay-derived ingredient, building on the historical use of clays in skincare (used for thousands of years in Egyptian and Chinese medicine for oil absorption and skin purification).
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR