Assay (acidimetric): 70.0 - 72.0 %

Color: ≤ 10 Hazen

Chlorate (ClO₃): ≤ 10 ppm

Chloride (Cl): ≤ 3 ppm

Free chlorine: ≤ 0.5 ppm

Phosphate and Silicate (as SiO₂): ≤ 5 ppm

Sulfate (SO₄): ≤ 10 ppm

Total nitrogen (N): ≤ 10 ppm

Heavy metals (as Pb): ≤ 1 ppm

Ag (Silver): ≤ 0.1 ppm

Al (Aluminium): ≤ 0.05 ppm

As (Arsenic): ≤ 0.05 ppm

Ba (Barium): ≤ 0.02 ppm

Be (Beryllium): ≤ 0.02 ppm

Bi (Bismuth): ≤ 0.1 ppm

Ca (Calcium): ≤ 0.5 ppm

Cd (Cadmium): ≤ 0.05 ppm

Co (Cobalt): ≤ 0.05 ppm

Cu (Copper): ≤ 0.1 ppm

Fe (Iron): ≤ 1.0 ppm

Ge (Germanium): ≤ 0.05 ppm

Hg (Mercury): ≤ 0.005 ppm

K (Potassium): ≤ 0.1 ppm

Li (Lithium): ≤ 0.02 ppm

Mg (Magnesium): ≤ 0.5 ppm

Mn (Manganese): ≤ 0.02 ppm

Mo (Molybdenum): ≤ 0.05 ppm

Na (Sodium): ≤ 0.5 ppm

Ni (Nickel): ≤ 0.1 ppm

Pb (Lead): ≤ 0.05 ppm

Sr (Strontium): ≤ 0.02 ppm

Ti (Titanium): ≤ 0.1 ppm

Tl (Thallium): ≤ 0.05 ppm

V (Vanadium): ≤ 0.05 ppm

Zn (Zinc): ≤ 0.1 ppm

Zr (Zirconium): ≤ 0.1 ppm

Residue on ignition (as sulfate): ≤ 30 ppm

Identity: passes test

Density (d 20/20): approx. 1.7

Conform to ACS, ISO, Reag.Ph Eur.