Assay (argentometric): 99.8 - 100.5 %

Identity: passes test

Acidity or alkalinity: passes test

Free acid: passes test

Appearance of solution: passes test

Chloride (Cl): ≤ 0.0005 %

Sulfate (SO₄): ≤ 0.002 %

Cd (Cadmium): ≤ 0.0001 %

Cu (Copper): ≤ 0.0002 %

Fe (Iron): ≤ 0.0002 %

Mn (Manganese): ≤ 0.0005 %

Ni (Nickel): ≤ 0.0005 %

Pb (Lead): ≤ 0.001 %

Tl (Thallium): ≤ 0.001 %

Zn (Zinc): ≤ 0.0001 %

Copper and substances precipitated by NH₃ (Al, Bi, Cu, Pb): passes test

Substances not precipitated by hydrochloric acid (as sulfate): ≤ 0.01 %

Substances not precipitated by hydrochloric acid: ≤ 0.3 %

Corresponds to ACS, ISO, Reag. Ph Eur