Description

Bentonite, Sodian CAS NO 85049-30-5 is a sodium-activated bentonite clay, a key industrial mineral valued for its exceptional swelling capacity and high cation exchange properties. This material is critical for applications requiring superior viscosity, suspension, and sealing performance. It is an essential raw material for the drilling, foundry, construction, and environmental remediation industries.

Application

• Drilling Fluids: Primary component in water-based muds (WBM) for viscosity control, fluid loss prevention, and wellbore stabilization in oil, gas, and geothermal drilling.
• Foundry & Metalcasting: Used as a bonding agent in green sand molds for ferrous and non-ferrous castings, providing necessary strength and plasticity.
• Civil Engineering & Construction: Employed as a slurry wall component for trench stabilization and as a waterproofing and sealing agent in geosynthetic clay liners (GCLs) for landfills and containment ponds.
• Pelletizing (Iron Ore): Acts as a binding agent in the production of iron ore pellets for blast furnace feed.
• Environmental Remediation: Utilized for soil sealing, lining, and as a component in slurry walls to contain contaminants.
• Cat Litter & Absorbents: Base material for clumping cat litter and industrial absorbents due to its high moisture absorption and clumping characteristics.
• Agriculture: Used as a carrier for pesticides and fertilizers, and as a soil amendment to improve water retention in sandy soils.
• Pharmaceuticals & Cosmetics: Refined grades are used as a suspending agent, viscosity enhancer, and excipient in topical formulations and personal care products.

Basic Information

Product Name	Bentonite, Sodian
CAS No.	85049-30-5
Molecular Formula	Al2O3·4(SiO2)·H2O (Approximate, variable)
Molecular Weight	~ 360.31 g/mol (Approximate, for idealized formula)
Synonyms	Sodium Bentonite; Wyoming Bentonite; Swelling Bentonite; Sodium Montmorillonite; API Bentonite; Volclay; Tixoton; Gelwhite; Southern Clay; Smectite Clay; Activated Clay; Drilling Mud Clay; Foundry Bonding Clay
EINECS	285-199-4

Quality Control

Our Bentonite, Sodian is produced and tested to meet stringent industry specifications, including API 13A Sec. 9 for drilling-grade material and relevant foundry standards. Quality is assured through batch-by-batch analysis of key parameters such as viscosity yield, fluid loss, and moisture content. Certificates of Analysis (COA) documenting full test results are available for every shipment upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept sealed when not in use to prevent caking and performance degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Fine, free-flowing powder
Color	Off-white to cream
Moisture Content	≤ 12.0 %
pH (5% slurry)	9.5 - 10.5
Viscosity, Apparent (600 rpm)	≥ 30 cP
Yield Point / Plastic Viscosity (YP/PV Ratio)	Contact for details
API Fluid Loss	≤ 15.0 ml
Wet Screen Analysis (Residue on 200 mesh)	≤ 2.5 %
Cation Exchange Capacity (CEC)	Contact for details
Swelling Index (Free Swell)	≥ 24 ml/2g

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.