Item

Standard

Appearance

White or off-white crystalline powder

Specific optical rotation

+10.5° to +12.3°

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 0.20%

Assay

98.0 to 101.0%