Assay (perchloric acid titration): 99.0 - 101.0 %

Assay (perchloric acid titration, calculated on dried substance): 99.0 - 101.0 %

Identity: passes test

Appearance of solution: passes test

Insoluble matter: ≤ 0.005 %

pH-value (5 %; water): 7.5 - 9.0

Chloride (Cl): ≤ 0.0005 %

Phosphate (PO₄): ≤ 0.0002 %

Sulfate (SO₄): ≤ 0.002 %

Total nitrogen (N): ≤ 0.001 %

Heavy metals (as Pb): ≤ 0.0005 %

Al (Aluminium): ≤ 0.0005 %

As (Arsenic): ≤ 0.0002 %

Ca (Calcium): ≤ 0.001 %

Cu (Copper): ≤ 0.0003 %

Fe (Iron): ≤ 0.0005 %

K (Potassium): ≤ 0.005 %

Mg (Magnesium): ≤ 0.0005 %

Pb (Lead): ≤ 0.0005 %

Calcium and Magnesium (as Ca): ≤ 0.005 %

Substances reducing permanganate: passes test

Reducing substances: ≤ 0.005 %

Loss on drying (130 °C): 39.0 - 40.5 %

UV absorption (254 nm; 1 mol/l; 1 cm; water): ≤ 0.02

UV absorption (280 nm; 1 mol/l; 1 cm; water): ≤ 0.01

UV absorption (350 nm; 1 mol/l; 1 cm; water): ≤ 0.01

Corresponds to ACS,ISO,Reag. Ph Eur