Item

Standard

Appearance

White powder

Specific rotation[α]20/D
(C=8 in 6N HCl)

-22.1 to -22.9 o

State of solution
(Transmittance)

Clear and colorless
Not less than 95.0%

Chloride (Cl)

16.49 to 17.00%

Heavy metal(Pb)

Not more than 10ppm

Arsenic(As2O3)

Not more than 2ppm

Loss on drying

Not more than 0.20%

Residue on ignition(sulfated)

Not more than 0.20%

Assay

98.0 to101.0%