Calcium Stearate

General Information

Product Name: Calcium Stearate
CAS: 1592-23-0
Catalog : SUR-AN-006
Applications: Plastics industry, textile industry, rubber industry, paints and coatings, food industry, others

Introduction

Calcium stearate, also known as calcium octadecanoate, is a calcium salt of stearic acid. This compound is integral in various industrial applications. Its synthesis involves the reaction between stearic acid and calcium hydroxide, resulting in a white, lightweight, crystalline powder.

Characteristics

Calcium stearate exhibits unique chemical and physical properties:

Appearance: It is a white, lightweight crystalline powder.
Solubility: Insoluble in water, cold ethanol, and ether, it is soluble in hot benzene, toluene, and turpentine, and slightly soluble in hot ethanol and ether.
Thermal Stability: Decomposes at high temperatures and in the presence of strong acids, releasing stearic acid and the corresponding calcium salt.

Basic Parameters

Type	Appearance	Calcium Content (%)	Melting Point (℃)	Weight Loss on Heating (%)	Free Acid (as stearic acid, %)	Residue on Sieve (200 mesh, %)
CS-1	White powder	7.0-7.3	155-165	≤ 3.0	≤ 0.5	≤ 1.0
CS-2	White powder	6.5-7.0	148-160	≤ 3.0	≤ 0.5	≤ 1.0
CS-3	White powder	6.5-7.0	148-156	≤ 2.0	≤ 0.5	≤ 1.0
CS-4	White powder or granule	6.5-7.3	148-165	≤ 3.0	≤ 0.5	--

* Typical values (not warranted values)

Applications

Calcium stearate finds applications in numerous industries due to its versatile properties:

Plastics Industry: Calcium Stearate serves as a stabilizer and lubricant in polyvinyl chloride (PVC), enhancing its thermal stability and processability. In polyethylene and polypropylene, it acts as a halogen absorber, improving material performance and longevity.
Textile Industry: In the production of polyolefin fibers and molded products, it functions as a lubricant, ensuring smooth processing and high-quality finishes. It also acts as a lubricant and release agent for thermosetting plastics like phenolic and amino resins.
Rubber Industry: As a thickening agent in lubricants, Calcium Stearate provides improved consistency and performance. It also acts as a waterproofing agent for fabrics, enhancing their resistance to water.
Paints and Coatings: In paint formulations, Calcium Stearate is used as a flatting agent, providing a matte finish and improving application properties. It also serves as a lubricant in pencil cores, facilitating smooth writing.
Food Industry: Food-grade Calcium Stearate is utilized as an anti-caking agent, preventing the clumping of powdered and granulated products, ensuring free-flowing consistency.

Packaging and Storage

Packaging Options: Typically packed in 20 kg bags, 400 kg ton bags. Custom packaging solutions can meet specific requirements.
Storage Conditions: Stored in a cool, dry place, away from sunlight and moisture, to prevent caking and ensure it remains free-flowing and easy to use.

Calcium stearate is a versatile compound with applications in plastics, textile, rubber, paints and coatings, food industries. Contact Alfa Chemistry today to learn more about our products and how they can benefit your applications.

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