Calcium Stearate

Calcium stearate is a non-toxic stabilizer and lubricant. It is an insoluble calcium salt of stearic acid and palmitic acid; it is formed when soap is mixed with water that contains calcium ions and is the scum produced in regions of hard water. Calcium stearate is insoluble in water; ether; chloroform; acetone ; cold alcohol, slightly soluble in hot alcohol; hot vegetable & mineral oils, quite soluble in hot pyridine.

Calcium stearate is highly recommended as stabilizer for PVC resins, lubricant (release agent) for plastic molding powders and tablets, emulsions, cements, pencils, for waterproofing NG base explosives; fabrics; cements & cement paints; mortar admixtures. Construction chemicals, flatting agent in paints; cosmetics. As lubricating agent in paper & paperboard coating compositions. In resin coated sands & foundry chemicals, in decaking food items like onions. As neutraliser; color stabiliser; fiber breakage reducer; and de-agglomeration agent in PP and HDPE applications.

Synonyms: octadecanoic acid calcium salt, stearic acid calcium salt.
CAS No.: 1592-23-0
Chemical formula: C36H70CaO4
Molecular weight: 607.03


calcium %

6.5 ± 7.3

melting point °C

130 min.

moisture %

2.0 max.

free acid %


Delicacy %