Item

Standard

Analysis data

Appearance

White powder

conforms

Specific rotation[α]20/D

(C=10 in 2N HCl)

-31.0 to -32.2 Degree

-31.42°

State of solution

Clear and colorless

conforms

Chloride (Cl)

Not more than 0.10%

0.018%

Heavy metal(Pb)

Not more than 10ppm

6ppm

Arsenic(As2O3)

Not more than 2ppm

<2ppm

Loss on drying

Not more than 0.20%

0.14%

Residue on ignition(sulfated)

Not more than 0.20%

0.09%

Assay

98.0 to101.0%

99.0%