Used as a fungicide, herbicide, and micronutrient fertilizer; in electroplating baths and industrial wastewater treatment. It also serves as a laboratory reagent and pigment source.

Toxic if ingested and dangerous to aquatic life. Avoid skin contact and inhalation of dust. Use protective clothing and segregate storage from acids.

25–50 kg polyethylene-lined bags or big bags. Store sealed, cool, and dry to prevent efflorescence and clumping.