Appearance
White crystals or crystalline powder
Specific rotation[α]20/D
-11.8 to -12.8°
State of solution
(Transmittance)
Not less than 95.0%
Chloride (Cl)
Not more than 0.10%
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 0.2%
Assay
98.0 to101.0%