Assay (alkalimetric): 99.0 - 102.0 %

Identity: passes test

Appearance of solution: passes test

Sodium Dihydrogene phospate: ≤ 2.5 %

pH-value (5 %; water): 9.0 - 9.3

Chloride (Cl): ≤ 0.0005 %

Sulfate (SO₄): ≤ 0.005 %

Total nitrogen (N): ≤ 0.001 %

Heavy metals (as Pb): ≤ 0.0005 %

As (Arsenic): ≤ 0.00005 %

Cu (Copper): ≤ 0.0002 %

Fe (Iron): ≤ 0.0005 %

K (Potassium): ≤ 0.005 %

Pb (Lead): ≤ 0.0005 %

Reducing substances: passes test

Water: 57.0 - 61.0 %

Corresponds to ISO,Reag. Ph Eur