French Green Clay
molecular structure · PubChem
AKA: Wilkonite, Alum bentonite, Bentonite magma, Colloidal clay, Aluminum silicate hydrate, Aluminium silicate hydrate, INS NO.558, Ci 77004
Synthetic
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
Form
Powder
State
NKRA; Dry Powder, Pellets or Large Crystals; Dry Powder; Other Solid; Dry Powder, Other Solid
Functions
Absorbent
Quells irritation
Reduces redness
Reduces swelling
Strengthens skin barrier
Traditional Use
Used for centuries in European skincare, particularly in France, for oil absorption and detoxification. Prized for its high mineral content and greenish color from iron oxide and chlorite, it became a staple in traditional spa treatments and home remedies for oily and problematic skin.
Skin Types
●all-skin-types, gentle
Best For
Oiliness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR