Description

Bentone 38 is a high-purity, organically modified montmorillonite clay, widely recognized as a highly effective rheological additive and thixotropic agent. Its primary value lies in its ability to impart superior viscosity control, anti-settling properties, and sag resistance to a diverse range of non-aqueous systems. This makes it an indispensable component for formulators seeking to enhance the stability and application performance of their products. Key industries that rely on Bentone 38 include paints & coatings, adhesives & sealants, greases, and various specialty chemical formulations.

Application

• As a thixotropic agent and anti-settling aid in solvent-based paints, industrial coatings, and marine coatings.
• To provide sag resistance and structural viscosity in high-build adhesives, sealants, and mastics.
• As a gellant and stabilizer in lubricating greases and specialty lubricants to prevent oil separation.
• For viscosity modification and suspension of pigments and fillers in printing inks and pigment concentrates.
• To control flow and prevent settling in epoxy and polyester resin systems and gel coats.
• As a rheology modifier in cosmetic formulations such as nail polishes and anhydrous products.
• In the stabilization of drilling fluid formulations for the oil and gas industry.

Basic Information

Item	Detail
Product Name	Bentone 38
CAS No.	12001-31-9
Molecular Formula	Complex silicate (primarily Montmorillonite)
Molecular Weight	Contact for details
Synonyms	Organoclay; Organophilic Clay; Hectorite; Bentone® 38; Quaternium-18 Bentonite; Quaternium-18 Hectorite; Stearalkonium Hectorite; Rheological Additive 38
EINECS	234-406-6

Quality Control

Our Bentone 38 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. While specific grades may vary, our standard product meets high-purity industrial specifications. A comprehensive Certificate of Analysis (COA) detailing key parameters such as moisture content, particle size, and rheological performance is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Off-white to cream fine powder
Moisture Content	≤ 3.5%
Particle Size (325 mesh residue)	≤ 0.5%
Loss on Ignition	30 - 40%
Gel Viscosity (in specified solvent)	Contact for details

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