|
Appearance
|
A white crystalline powder
|
|
Assay
|
98 - 102%
|
|
Insoluble matter
|
Max 0.01%
|
|
Free alkali (as NaOH)
|
Max 2.5%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Nitrogen compounds (as N)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|