|
Appearance
|
White powder or crystals and/or chunks having ammonical odour
|
|
Assay (as NH3)
|
Min. 31.0%
|
|
Insoluble matter in water
|
Max. 0.005%
|
|
Chloride (Cl)
|
Max. 0.0005%
|
|
Sulphur compounds (as SO4)
|
Max. 0.002%
|
|
Iron (Fe)
|
Max. 0.0005%
|
|
Heavy metal (as Pb)
|
Max. 0.0005%
|
|
Non-volatile matter
|
Max. 0.01%
|