Description

Zinc Stearate CAS NO 557-05-1 is a fine, white, hydrophobic powder consisting of a zinc salt of stearic and palmitic acids. This versatile metallic soap is valued for its excellent lubricating, release, and water-repellent properties, making it a critical functional additive in numerous manufacturing processes. It is essential for industries requiring reliable mold release, surface conditioning, and anti-caking performance.

Application

• Polymer & Rubber Processing: Acts as a highly effective lubricant and release agent in the production of plastics, rubber goods, and composites, preventing adhesion to molds and improving surface finish.
• Cosmetics & Personal Care: Serves as a texture enhancer, binder, and lubricant in powders, creams, and makeup formulations, providing a smooth, silky feel.
• Pharmaceuticals: Used as a tablet and capsule lubricant and glidant, ensuring efficient manufacturing and consistent dosage form quality.
• Paints & Coatings: Functions as a flatting and sanding agent, improving the matting effect and sandability of industrial paints and wood finishes.
• Building Materials: Employed as a hydrophobic agent and process aid in the production of cement, concrete, and other construction materials.
• General Industry: Utilized as an anti-caking and flow aid for powders, a dusting agent, and a waterproofing compound in various industrial applications.

Basic Information

Product Name	Zinc Stearate
CAS No.	557-05-1
Molecular Formula	C36H70O4Zn
Molecular Weight	632.33 g/mol
Synonyms	Zinc distearate; Octadecanoic acid, zinc salt; Dibasic zinc stearate; Zinc octadecanoate; Metallic soap; Zinc(II) stearate; Lubricant ZS; Stearic acid, zinc salt
EINECS	209-151-9

Quality Control

Our Zinc Stearate is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability. We offer grades suitable for industrial, cosmetic, and pharmaceutical applications, with quality control adhering to relevant industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, loss on drying, and other critical parameters is provided with every shipment to guarantee compliance with your specifications.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to caking and reduced performance.

Specification

Item	Specification
Appearance	Fine, white powder
Identification (IR)	Conforms
Assay (as Zn)	10.0% - 11.5%
Loss on Drying	≤ 1.5%
Free Fatty Acid	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Melting Point	Approx. 120°C
Particle Size (Typical)	95% < 45 μm

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