CAS 557-05-1 corresponds to zinc stearate, which is a white powdery metal soap compound mainly used as a heat stabilizer, lubricant, and release agent for plastics/rubber. It is also widely used in cosmetics and pharmaceutical excipients.

Core Information
-Chinese name: Zinc stearate; English name: Zinc steel
-Molecular formula: C ∝₆ H ₇₀ O ₄ Zn (often written as (C ₁₈ H ∝₅ O ₂) ₂ Zn); Molecular weight: 632.33
-Appearance: White or off white fine powder, smooth to the touch, with a slight fat odor; Insoluble in water, ethanol, ether, soluble in organic solvents such as benzene, turpentine, and dilute acids
-Melting point: 128-130 ° C; density: approximately 1.095 g/cm ³; Toxicity: Low toxicity
-Main applications: Heat stabilizers and lubricants for PVC and rubber products, plastic release agents, paint leveling agents, cosmetic powder adhesives, pharmaceutical excipients, etc
-Safe storage: Sealed storage, away from fire and heat sources, avoid contact with strong acids and oxidants

Key points of preparation and properties
1. Method: It is mainly prepared by the reaction of stearic acid and zinc oxide (or zinc hydroxide) through melting or water method, and the product is mostly a mixture of zinc stearate and zinc palmitate.
2. Chemical behavior: When encountering strong acids, it decomposes to produce stearic acid and corresponding zinc salts; After heating and dissolving in organic solvents, it is easy to form a gel when cooled.
3. Application characteristics: Good compatibility and lubrication, commonly used to improve material processing fluidity and weather resistance. Some specifications contain 12.5% -14.0% zinc oxide (pharmaceutical standard).

This substance is not a hazardous material, but dust protection is required for dust handling; Industrial packaging usually comes in 25kg woven bags or bagged bags.

Products :

CAS 557-05-1, Zinc stearate (C36H70O4Zn)
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