Product identity
- Mineral
- Sodium bentonite (montmorillonite)
- CAS number
- 1302-78-9
- HS code
- 2508.10
- Packaging
- 25 kg bag · 1,000 kg bulk bag
- Availability
- To order, FCL or part load
- Origin
- India
Industrial mineral
Bentonite
Highly colloidal sodium bentonite with high swelling capacity and yield. Used as a viscosifier and filtration-control agent in water-based drilling fluids, as a green-sand binder in foundries, and as a hydraulic barrier in civil works.
Grades supplied
| API drilling grade | Viscosifier for water-based muds | Standard |
| Foundry grade | Green-sand binder | Standard |
| Civil grade | Sealing and slurry wall | Standard |
Typical properties
| Property | Value | Method |
|---|---|---|
| Swell index | ≥ 24 mL/2 g | ASTM D5890 |
| Moisture | ≤ 10 % | ISO 787-2 |
| pH, 5 % suspension | 8.5–10.5 | ISO 787-9 |
| Residue, 200 mesh (75 µm) | ≤ 4.0 % | Sieve |
| Viscometer reading at 600 r/min | ≥ 30 | API 13A |
Standard grades
- Water-based drilling fluids
- Foundry green-sand binder
- Slurry walls and landfill lining
- Horizontal directional drilling
Values are typical and are confirmed on the certificate of analysis supplied with each lot. They do not constitute a specification unless agreed in writing.