TSCA Definition 2019: Product from the roasting of lead ore flue dust acid cake. Consists primarily of sulfates of Cd, Pb, As, Tl, Te and In.

TSCA Definition 2019: Product of the roasting of cadmium-enriched lead smelting dusts to remove cadmium. Consists primarily of oxides and sulfates of lead and zinc.

TSCA Definition 2019: Product resulting from the roasting of various dusts, precipitates, or concentrates. Composed primarily of sulfides, oxides and mixed oxides of nickel, copper, cobalt, and iron. As part of this process, undesirable impurities such as arsenic may be removed.

TSCA Definition 2019: By-product produced during roasting of fly ash from a secondary copper smelter at 482.degree.C to 649.degree.C (900.degree.F to 1200.degree.F). Consists primarily of chlorides and oxides of copper, lead and zinc.

TSCA Definition 2019: Sinter formed by heating finely divided lead concentrates and fluxes to a softening condition to agglomerate without fusion.

TSCA Definition 2019: Product of the reaction of zinc ore concentrates with air at 954.degree.C to 1010.degree.C (1750.degree.F to 1850.degree.F). Consists primarily of ZnO, ZnFeO2, ZnSO4 and a composite of metallic oxides.