Other Trading Names:

  • Montmorillonite
  • Sodium Bentonite

CAS Number: 1302-78-9

HS Code: 25081000

Types of Packaging:

  • 25kg/bag
  • 50kg/bag
  • 100kg/bag
  • 1000kg/bag
Inquiry right-arrow $100.00
Availability: In stock

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Chemical Name




Molecular Formula


CAS Number



Off-White, yellow powder

Grade Standard

High Grade


Insoluble in Water


2.2 to 2.8 g/cm 3

Chemical Description 

  • Bentonite is a type of clay consisting mainly of montmorillonite, a group of minerals that are part of the smectite class. It is characterized by its ability to swell and increase in volume when exposed to water, making it highly useful in various industrial and commercial applications.
  • In drilling operations, Bentonite serves as a mud constituent for oil and water well drilling. Its swelling property helps in sealing the borehole walls, to remove drill cuttings and to lubricate the cutting head.
  • In the foundry industry, it is used as a binder in the preparation of molding sand for the production of iron, steel, and non-ferrous casting. The binding property of Bentonite ensures the mold retains its shape and detail until the metal has solidified.
  • Bentonite is also a key component in the process of iron ore pelletizing, where it acts as a binder to shape iron ore into pellets for further processing and transportation.
  • In construction, it is used in waterproofing applications and as a barrier material in environmental protection projects due to its low permeability and chemical stability.
  • The cosmetic and pharmaceutical industries utilize Bentonite for its absorbing and suspending properties. It is a common ingredient in skincare products, detox baths, and as a base for medicinal creams and powders.
  • In animal feed, Bentonite is added as a pellet binding agent, which helps in the formation of pellets, making the feed more palatable and easier to handle.
  • Bentonite's ability to absorb toxins, heavy metals, and impurities makes it valuable in water treatment processes.
  • The clay is also explored in agriculture as a soil conditioner, improving the water retention of sandy soils and as a carrier for pesticides and fertilizers.
  • Due to its high cation exchange capacity, Bentonite is effective in removing proteins and impurities in wine and edible oils, clarifying these liquids without affecting their taste.
  • Bentonite's natural, non-toxic, and biodegradable nature aligns with the growing demand for environmentally friendly materials in various industries.
  • Despite its extensive utility, Bentonite's efficiency and suitability for specific applications depend on its mineral composition, which can vary significantly between different deposits.
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