Zinc sulfide (or zinc sulfide) is an inorganic compound with the chemical formula of ZnS.
This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite.
Although this mineral is usually black because of various impurities, the pure material is white.

APPEARANCE	White powder
CONTENT	99.0% min
ZnS	28.0% min or 30.0% min
ZnO	0.5% max
pH	6.8 – 7
PARTICLE SIZE	99.9% (<63 µm)
VOLATILE MATTER	0.3% max