ITEM

STANDARD

RESULTS

Characters

White granular crystals or a white crystalline powder

White granular crystals

Assay (Anhydrous basis)

≥98.5%

98.75

Chloride

≤30 ppm

<10

Sulphate

≤50 ppm

<5

Readily carbonisable substances

Meets 1983

Meets 1983

Oxalat

≤400 ppm

<400

Heavy metals

≤5 ppm

<2

Transparency

Meets 1983

Meets 1983

Iron

≤10 ppm

<1

Arsenic          

≤3ppm

<3

Pb

<2ppm

<2

Conclusion

Meets 1983