Test Items

Specification

Characteristic

white or almost white crystals powder

Melting point

113～117℃

Fe

≤10ppm

Transmittance

≥97%

Loss on drying

≤0.5%

Residue on ignition

≤0.2%

Heavy metals

≤10ppm

Arsenic

≤3ppmn

Assay

≥98%