Zinc stearate is a chemical compound from the zinc soap family that exists as a white, micronized, hydrophobic powder. This widely used industrial chemical is obtained by reacting fatty acids with a zinc metal compound.
The lipophilic nature of this compound makes it act as a phase transfer catalyst in the saponification process of fats. Zinc stearate is widely used in various industries, including the production of plastics, rubber, cosmetics, paints and coatings, due to its lubricating, anti-sticking and hydrophobic properties.
In the plastics industry, zinc stearate is used as a heat stabilizer and lubricating agent to improve the production process and increase the quality of the final products. It is also used in cosmetics as an opacifying and anti-sticking agent in the production of powders and creams.
Technical Characteristics
| Chemical Formula | C36H70O4Zn |
| Other names | zinc octadecanoatezinc distearate |
| CAS Number | 557-05-1 |
| Molar mass | 632.33 g/mol |
| Melting Point | 120 to 130 °C |
| Appearance | soft, white powder |
Applications
– External lubricant in the plastic and polymer industries
– Dispersing, releasing and spreading agent in various masterbatches
– Sanding agent in sealers
– Pulp & paper industry
– As a heat stabilizer
– Pharmaceutical industry
– Paint and coating industries
– Cosmetics and health industries
– Wood and construction products
Environmental impact of Zinc Stearate
Zinc stearate is a low-hazard chemical that naturally degrades. However, if released in excess into the environment, it may accumulate in aquatic ecosystems and cause pollution. It can be released into the air as particulate matter and have negative effects on air quality. Improper disposal may also lead to soil contamination. Compliance with environmental standards and proper management in the use and disposal of this material is essential.
Safety Measures and Regulations for Handling Zinc Stearate
Zinc stearate in powder form may cause respiratory irritation; therefore, the use of a suitable mask is essential to prevent inhalation. It is also recommended to use gloves and safety glasses to prevent direct contact with skin and eyes. This chemical should be stored in closed containers and in a cool, dry place. In case of spillage or release, it should be cleaned up carefully to prevent it from dispersing into the air. Compliance with safety and environmental regulations is mandatory when handling and disposing of zinc stearate.
Packing
This chemical is available in 20 kg bags.