PYRITES, CALCINED (Calcined Pyrites)
Dust to fines, Calcined Pyrites is the residual product from the chemical industry where all types of metal sulphides are either used for the production of sulphuric acid or are processed to recover the elemental metals – copper, lead, zinc, etc. The acidity of the residue can be considerable, in particular, in the presence of water or moist air, where pH values between 1.3 and 2.1 are frequently noted.
Highly corrosive to steel when wet. Inhalation of dust is irritating and harmful. Cargo may
liquefy. This cargo is non-combustible or has a low fire-risk.