Products Description
Montmorillonite is a 2:1 layered aluminosilicate clay. Each layer consists of one octahedral alumina sheet sandwiched between two tetrahedral silica sheets. The interlayer space contains exchangeable cations (Na⁺, Ca²⁺) and water molecules, which give the clay its characteristic cation-exchange capacity, swelling behavior and surface acidity.
Through acid activation, the layered structure is partially dealuminated, generating a high specific surface area, enhanced porosity and a large number of surface acid sites (both Brønsted and Lewis type) — the key to its catalytic performance.
Chemical Properties
| Parameter | Value |
|---|---|
Melting Point | >300°C |
Density | 2-3 |
Storage Temp. | Room temperature; keep container tightly closed in a cool, dry place |
Form | Powder |
Color | Off-white to light grey / pale yellow |
pH | 2.8-3.8 |
Water Solubility | Insoluble in water |
Merck | 14,6260 |
Cosmetics Ingredients | ABRASIVE |
Functions | Solid acid catalyst; catalyst support; adsorbent; cation exchanger; viscosity controller / thickener (cosmetic & industrial use) |
InChI | InChI=1S/2Al.4O2Si.H2O.3O/c;;41-3-2;;;;/h;;;;;;1H2;;;/q2+3;;;;;;3*-2 |
InChIKey | GUJOJGAPFQRJSV-UHFFFAOYSA-N |
SMILES | O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O |
EPA Substance Registry System | Listed — Montmorillonite ((Al1.33-1.67Mg0.33-0.67)(Ca0-1Na0-1)0.33Si4(OH)2O10·xH2O) (1318-93-0) |
Safety Information
Parameter | Value |
|---|---|
Symbol (GHS) | GHS05,GHS08 |
Signal Word | Warning |
Hazard Statements | H290-H315-H319-H373 |
Precautionary Statements | P260-P305+P351+P338 |
PPE | Dust mask (NIOSH-approved respirator), chemical-resistant gloves, safety goggles, protective clothing |
Hazard Codes |
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Risk Statements |
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Safety Statements |
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WGK Germany | 3 (water hazard class, per Sigma-Aldrich; may vary by supplier) |
RTECS | CT9450000 |
TSCA | Yes |
HS Code | 25084000 |
Storage Class | 11 - Combustible Solids |
Hazardous Substances Data | 1318-93-0(Hazardous Substances Data) |
Product Applications
Montmorillonite is widely used across medicine, animal feed, veterinary care and aquaculture. In livestock farming, it is especially valued for its multifunctional benefits: controlling diarrhea, adsorbing molds and bacteria, purifying water, supporting hemostasis and anti-inflammatory responses, and enhancing stress tolerance. As a natural and eco-friendly material, it delivers excellent safety without toxic side effects.
