Assay

99.7 - 100.5 %

Identification (IR)

Passes test

Readily carbonisable substances

Passes test

Heavy metals (as Pb)

Max. 10 ppm

Ignition residue (SO₄)

Max. 0.02 %

Insolubility in water

Max. 50 ppm

Oxalic acid (calculated on anhydrous)

Max. 360 ppm

Tartaric acid

Max. 0.2 %

Water

7.5 - 9.0 %

C₂O₄ (as C₂H₂O₄)

Max. 0.04 %

Cl (Chloride)

Max. 5 ppm

PO₄ (Phosphate)

Max. 10 ppm

SO₄ (Sulphate)

Max. 20 ppm

As (Arsenic)

Max. 0.1 ppm

Ca (Calcium)

Max. 20 ppm

Cu (Copper)

Max. 5 ppm

Fe (Iron)

Max. 3 ppm

Mg (Magnesium)

Max. 5 ppm

Ni (Nickel)

Max. 1 ppm

Pb (Lead)

Max. 2 ppm

Conforms to ACS

Passes test

Conforms to Reag. Ph.Eur.

Passes test

Conforms to Reag. USP

Passes test