|
Appearance
|
White crystalline powder
|
|
Assay (complexometric; on dried basis)
|
99 - 101%
|
|
pH (5% solution in water)
|
4 - 5
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Copper (Cu)
|
Max 0.00025%
|
|
Insoluble matter in water
|
Max 0.005%
|
|
Nitrilotriacetic acid
|
Max 0.05%
|
|
Chloride (Cl)
|
Max 0.01%
|
|
Sulphate (SO4)
|
Max 0.02%
|
|
Nickel (Ni)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.0005%
|
|
Loss on drying (at 150°C; 6 hrs)
|
8.7-11.4%
|