Item

Specification

Result

Appearance

White/off-white crystalline powder

White crystalline powder

Solubility

Dissolves in water

Pass

Identification

Positive

Pass

Assay (based on drying)

99.5% - 101.0%

99.8%

Loss on drying

≤ 1.0%

0.36%

Residue on ignition

≤ 0.1%

0.08%

Melting point

234oC - 238oC

236.2oC - 237.3oC

Heavy metal (as Pb)

≤ 20 ppm

10 ppm