Item
Standard
Appearance
White powder
**
rotation[α]20/D
(C=10 in 2N HCl)
-31.0 to -32.2 Degree
State
of solution
Clear and colorless
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
to101.0%