Description

Barium Stearate CAS NO 6865-35-6 is a white, fine powder classified as a metallic soap, specifically the barium salt of stearic acid. It serves as a highly effective and versatile heat stabilizer and lubricant in polymer processing, particularly for polyvinyl chloride (PVC). This compound is essential for manufacturers in the plastics, rubber, and coatings industries who require improved thermal stability, reduced friction during extrusion, and enhanced surface finish in their final products.

Application

• PVC Stabilizer & Lubricant: Primary application as a cost-effective heat stabilizer and internal/external lubricant in rigid and flexible PVC formulations for pipes, profiles, cables, and films.
• Rubber Industry: Used as a release agent, dusting powder, and processing aid to prevent sticking during molding and calendaring.
• Grease & Lubricant Thickener: Acts as a gelling agent in the production of high-temperature and water-resistant greases.
• Polymer Processing Aid: Improves flow properties and reduces melt viscosity in various thermoplastic processing operations.
• Waterproofing Agent: Imparts water-repellent properties to textiles, paper, and construction materials like concrete.
• Cosmetics & Personal Care: Functions as an opacifying agent and viscosity modifier in certain cosmetic formulations.
• Paints & Coatings: Used as a flatting agent and to improve sanding properties in some surface coatings.

Basic Information

Product Name	Barium Stearate
CAS No.	6865-35-6
Molecular Formula	C36H70BaO4
Molecular Weight	704.58 g/mol
Synonyms	Barium Distearate; Octadecanoic Acid, Barium Salt; Dibarium Octadecanoate; Stearic Acid, Barium Salt; Barium(II) Stearate; Barium Octadecanoate; Metasap® Ba Stearate; BaSt (common abbreviation)
EINECS	229-966-3

Quality Control

Our Barium Stearate is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure it meets consistent specifications for purity, physical properties, and performance. Certificates of Analysis (COA) detailing key parameters such as barium content, moisture, melting point, and acid value are provided to guarantee supply reliability and product consistency for your industrial processes.

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); keep the container tightly sealed when not in use to prevent caking and degradation due to moisture absorption. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	White fine powder
Identification (IR)	Complies
Assay (as BaO)	28.0 - 31.0 %
Melting Point	≥ 220 °C
Loss on Drying	≤ 1.5 %
Acid Value	≤ 5 mg KOH/g
Fineness (200 mesh)	≥ 99.0 % pass
Heavy Metals (as Pb)	≤ 20 ppm

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