Item

Standard

Analysis data

Appearance

White crystals

Conforms

Specific rotation[α]D/20

(C=2  in H2O)

+10.8°to +12.3°

+11.65°

Melting Point (ºC)

159 to 161 ºC

160ºC

Chloride(C1)

Not more than 0.02%

0.012%

Sulfate(SO4)

Not more than 0.02%

0.01%

Iron(Fe)

Not more than 30ppm

20ppm

Heavy metals(Pb)

Not more than 10ppm

6ppm

Arsenic(As2O3)

Not more than 1ppm

0.5ppm

Loss on drying

Not more than 0.50%

0.19%

Residue on ignition

Not more than 0.10%

0.07%

Assay

98.0%～101.0%

99.0%