Question

Elemental impurities classification

Answer 1

Elemental impurities are classified into three categories [6] based on their toxicity (PDE) and occurrence in the drug product. Class 1 includes As, Pb, Hg and Cd. ... The elemental impurities in class 2B include: Ag, Au, Ir, Os, Pd, Pt, Rh, Ru, Se and Tl.