Items

Standard

Analysis data

Appearance

White crystals or crystalline powder

conforms

Specific rotation[α]20/D

(C=1 Acetic acid)

+9.3°+ 2°

8.14°

Melting point

159 to 168℃

160℃

Heavy metal(Pb)

Not more than 20ppm

<20ppm

Arsenic (As2O3)

Not more than 2ppm

<2ppm

Loss on Drying

Not more than 0.50%

0.18%

Residue on ignition

Not more than 0.30%

0.1%

Assay

98.0% to 102%

98.6%