|
Appearance
|
White powder or crystalline Powder
|
|
Assay
|
Min 99%
|
|
pH (5 % solution)
|
4.2 - 4.8
|
|
Chloride (Cl)
|
Max 0.004%
|
|
Sulphate (S)
|
Max 0.01%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Cyanide (CN)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Nitrilotriacetic acid
|
Max 0.05%
|
|
Loss on drying (at 150°C; 6 hrs)
|
8.5 - 9.5%
|