Assay (iodometric): 99.7 - 100.4 %

Insoluble matter: ≤ 0.005 %

pH-value (5 %; water): 5.0 - 8.0

Chloride, Chlorate, Bromide, Bromate (as Cl): ≤ 0.01 %

Iodide (I): ≤ 0.001 %

Sulfate (SO₄): ≤ 0.005 %

Total nitrogen (N): ≤ 0.002 %

Heavy metals (ACS): ≤ 5 ppm

Heavy metals (as Pb): ≤ 0.0005 %

As (Arsenic): ≤ 0.0003 %

Fe (Iron): ≤ 0.001 %

Na (Sodium): ≤ 0.005 %

Pb (Lead): ≤ 0.0004 %

Loss on drying (130 °C): ≤ 0.05 %

Corresponds to ACS, ISO, Reag. Ph Eur