montmorillonite CAS Number: 1318-93-0
Pharmaceutical Materials 2025-03-02
CAS Number: 1318-93-0
Molecular Formula: (Na, Ca)0.33(Al,Mg)2Si4O102·nH2O
Appearance: White, shallow grayish white, shallow green, or pale red powder
Properties: Strong adsorption, cation exchange, swelling, dispersion, lubrication, plasticity, and bonding properties
Usage: Used in drilling mud, adhesives, catalysts, desiccants, fillers, soil conditioners, and water purification.
Montmorillonite, with the CAS number 1318-93-0, is a naturally occurring clay mineral belonging to the smectite group. It is primarily composed of hydrated sodium calcium aluminum silicate and is renowned for its exceptional adsorption, cation exchange, and swelling properties. Montmorillonite’s layered structure allows for the intercalation of various cations and water molecules, contributing to its diverse applications. This mineral is widely used in industries such as drilling muds, adsorbents, and catalysts, as well as in animal feed and pharmaceuticals, particularly as an active ingredient in diarrhea treatment medications.
| Property | Value |
|---|---|
| Chemical Name | Montmorillonite |
| CAS Number | 1318-93-0 |
| Color | Beige to gray, can vary with impurities |
| Density | 2-3 g/cm³ |
| pH Value | 2.8-3.8 |
| Water Solubility | Insoluble in water |
| Cation Exchange Capacity | High, dependent on cation type and interlayer spacing |
| Swelling Property | Significant, especially for sodium montmorillonite |
| Morphology | Powder, forms microscopic crystals upon precipitation from aqueous solutions |
| Crystal Structure | 2:1 layered silicate, consisting of two tetrahedral sheets sandwiching an octahedral sheet |
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