Assay (complexometric): 99.0 - 102.0 %

Identity: passes test

Appearance of solution: passes test

Insoluble matter: ≤ 0.01 %

Acidity or alkalinity: passes test

pH-value (5 %; water, 25 °C): 4.5 - 8.5

Sulfate (SO₄): ≤ 0.005 %

Heavy metals (ACS): ≤ 5 ppm

Al (Aluminium): ≤ 0.0001 %

Ba (Barium):

≤ 0.003 %

: passes test

Cu (Copper): ≤ 0.0005 %

Fe (Iron): ≤ 0.0003 %

K (Potassium): ≤ 0.01 %

Mg (Magnesium): ≤ 0.005 %

Na (Sodium): ≤ 0.01 %

NH₄ (Ammonium): ≤ 0.005 %

Sr (Strontium): ≤ 0.05 %

Magnesium and alkali metals: ≤ 0.5 %

Oxidizing substances (as NO₃): ≤ 0.003 %

Corresponds to ACS, Reag. Ph Eur