|
Appearance
|
White crystalline powder
|
|
Assay (acidimetric)
|
Min 99%
|
|
PH (5% solution in CO2 free water)
|
3.8 - 4.4
|
|
Insoluble matter
|
Max 0.005%
|
|
Chloride (Cl)
|
Max 0.0005%
|
|
Nitrate (NO3)
|
Max 0.001%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Potassium (K)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.005%
|
|
Calcium (Ca)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.0005%
|