BENTONITE

PRODUCT IDENTIFICATION

CAS NO. 1302-78-9

BENTONITE 

EINECS NO.  
FORMULA Al2H2O6Si
MOL WT. 180.06
H.S. CODE 2508.10

TOXICITY

 
SYNONYMS Taylorite; Wilkinite; Alumino silicate;
Sodium montmorillonite;

SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE gray powder or granules
MELTING POINT  
BOILING POINT 2760 C
SPECIFIC GRAVITY 2.5 (- 6.5)
SOLUBILITY IN WATER Insoluble (Forms a colloidal suspension )
pH 8.0 - 8.5
VAPOR DENSITY  
AUTOIGNITION

 

NFPA RATINGS Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT Not considered to be a fire hazard
STABILITY Stable under ordinary conditions

GENERAL DESCRIPTION & APPLICATIONS

Bentonite is an absorbent aluminum silicate (hydrated) clay formed from volcanic ash decomposition and largely composed of montmorillonite and beidellite. It is used in various adhesives, cements, and ceramic fillers. It is used in the making of fillers, sizings, and dressings in construction, in clarifying water and wine, in purifying sewage, and in the wet end paper, ceramics, plastics, and rubber industries. Other appliactiona include in in animal feed, asphalt emulsion, brick, detergent. Special grades are used in dental materials, foods and cosmetics. The pharmaceutical industry uses it as a suspending agent. Highly absorbent, bentonite is much used in foundry work for facing the molds and preparing the molding sands for casting metals. The less absorbent bentonites are used chiefly in the oil industry, e.g., as filtering and deodorizing agents in the refining of petroleum and, mixed with other materials, as drilling muds to protect the cutting bit while drilling.
SALES SPECIFICATION
SiO2

67.0% nin

Al2O3

15.5% min

TRANSPORTATION
PACKING 50kgs in bag

HAZARD CLASS

Not regulated
UN NO.  


OTHER INFORMATION