|
Appearance
|
White powder or crystal or chunks
|
|
Assay
|
Min 99%
|
|
Insoluble matter in water
|
Max 0.005%
|
|
Melting point
|
About 59 deg C
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Lead (Pb)
|
Max 0.003%
|
|
Copper (Cu)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Zinc (Zn)
|
Max 0.001%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.005%
|