|
Appearance
|
White powder
|
|
Assay (acidimetric)
|
99 - 101%
|
|
Substance insoluble in dilute HCl
|
Max 0.015%
|
|
Chloride (Cl)
|
Max 0.002%
|
|
Sulphide (S)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.002%
|
|
Calcium (Ca)
|
Max 0.05%
|
|
Strontium (Sr)
|
Max 0.7%
|
|
Potassium (K)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Substance oxidizable (as NO3)
|
Max 0.005%
|
|
Water soluble titrable base
|
Max 0.002 meq/g
|