|
Appearance
|
White crystalline powder or crystal or flakes
|
|
Assay
|
Min 98%
|
|
Substance insoluble in dilute HCl
|
Max 0.005%
|
|
Carbonates (as BaCO3)
|
Max 2%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Sulphide (S)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Calcium (Ca)
|
Max 0.05%
|
|
Strontium (Sr)
|
Max 0.5%
|
|
Potassium (K)
|
Max 0.01%
|
|
Sodium (Na)
|
Max 0.01%
|
|
Substance not precipitated by dilute H2SO4 (as SO4)
|
Max 0.2%
|