Toxicology of zinc sulfide

Zinc sulfide (Sachtolith) is mainly used in plastics. Functional properties such as lightning and hiding power are criteria for using Sachtolith. It has proved to be very useful for colouring many thermoplastics. During the dispersion process, it does not cause abrasion of metallic production machinery or adversely affect the polymer, even at high operating temperatures or during multistage processing. Even ultrahigh molecular mass thermoplastics can be coloured without problems. In glass-fibre-reinforced plastics, the soft texture of Sachtolith prevents mechanical fibre damage during extrusion. Sachtolith is also used as a dry lubricant during the fabrication of these materials. The low abrasiveness of Sachtolith prolongs the working life of stamping tools used to manufacture industrial rubber articles. The lightfastness and ageing resistance of many elastomers is improved by using Sachtolith. It is also a dry lubricant for roller and plain bearings and a white pigment for greases and oils. The use of zinc sulfide and barium sulfate in contact with foods is permitted by the FDA (United States) and most European countries. Some restrictions apply in France, Italy, the United Kingdom, and Czechoslovakia. Soluble zinc is toxic in large amounts, but the human body requires small quantities (10–15 mg d−1) for metabolism. Zinc sulfide is harmless in the human due to its low solubility. The acid concentration in the stomach and the dissolution rate following ingestion is insufficient to produce physiologically significant quantities of soluble zinc. LD50 values in the rat exceed 15 g kg−1. No cases of poisoning or chronic damage to health have been observed in the manufacture of zinc sulfide pigments. If you are looking for high quality, high purity and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.