Zinc stearate, with the CAS number 557-05-1, is a versatile chemical compound widely used across various industries. It is a white, hydrophobic powder that is known for its slight characteristic odor. The chemical formula for zinc stearate is C36H70O4Zn, and it has a molar mass of approximately 632.33 g/mol. The compound has a melting point ranging from 120 to 130 °C and a density of about 1.095 g/cm³.
Properties and Characteristics
Appearance: Soft, white powder
Odor: Slight, characteristic
Melting Point: 120 to 130 °C
Density: 1.095 g/cm³
Solubility: Insoluble in water, ethanol, and diethyl ether; slightly soluble in benzene.
Applications
Zinc stearate is utilized in a variety of applications due to its beneficial properties:
Plastics and Polymers: It acts as a heat stabilizer and lubricant, particularly in the production of polyvinyl chloride (PVC) and other plastic materials. It helps control thermal degradation and improves the processing of plastics.
Rubber Industry: In rubber manufacturing, zinc stearate serves as an anti-adhesive and lubricant, preventing sticking during processing and enhancing the quality of rubber products.
Paints and Coatings: It is used as a dispersant and matting agent in paints, lacquers, and varnishes, improving the texture and finish of coatings.
Cosmetics and Personal Care: Zinc stearate is included in formulations for its emulsifying and thickening properties, as well as its ability to provide a smooth feel to products.
Metalworking: It is employed as a lubricant in metal forming processes, enhancing the performance of metalworking fluids.
Safety and Handling
Zinc stearate is generally considered non-toxic, but it should be handled with care to avoid inhalation or contact with skin. It is classified as a mild irritant and should be stored in a cool, dry place away from incompatible substances.
In summary, zinc stearate (CAS 557-05-1) is a valuable compound with a wide range of applications in industries such as plastics, rubber, paints, and cosmetics, owing to its unique physical and chemical properties.
Zinc stearate CAS 557-05-1
CAS No.557-05-1
Other Name:Zinc distearate
MF:2(C18H35O2).Zn