Montmorillonite
molecular structure · PubChem
AKA: Wilkonite, Alum bentonite, Bentonite magma, Colloidal clay, Aluminum silicate hydrate, Aluminium silicate hydrate, INS NO.558, Ci 77004
Synthetic
Emulsifier
Clay
Clean
Montmorillonite is a subclass of smectite and a natural aluminomagnesium silicate clay, with potential protective effect for the digestive tract mucosa, and anti-inflammatory and anti-diarrheal activities. Although the exact mechanism of action has yet to be fully elucidated, upon administration, montmorillonite may adsorb bacteria, bacterial enterotoxins, viruses and other potentially diarrheagenic substances. It may also bind to mucin and modify mucus properties, thereby enhancing the mucus barrier function.
Solubility Insoluble in water and common organic solvents
Formula
Al2H2O12Si4
Mol. Weight
360.31
CAS #
1318-93-0
Form
Powder
State
NKRA; Dry Powder, Pellets or Large Crystals; Dry Powder; Other Solid; Dry Powder, Other Solid
Functions
Absorbent
Bulking
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Light Stabilizer
Viscosity Controlling
Quells irritation
Reduces redness
Reduces swelling
Shields from UV damage
Strengthens skin barrier
Traditional Use
Used for thousands of years in traditional medicine and skincare across Africa, Asia, and the Middle East for oil absorption and detoxification. Particularly valued in traditional clay treatments for skin purification and wound healing.
Skin Types
●all-skin-types
Best For
Oiliness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR