Appearance (Colour)
Pale violet to almost white
Appearance (Form)
Crystals or crystalline powder
Solubility (Turbidity) 10% aq. solution
Clear
Assay (Iodometric)
min. 99%
pH (5% aq. solution)
2.0 - 5.0
Insoluble matter
max. 0.003%
Chloride (CI)
max. 0.0005%
Heavy Metals (Pb)
max. 0.002%
Phosphate (PO4)
max. 0.003%
Copper (Cu)
max. 0.001%
Potassium (K)
max. 0.002%
Sodium (Na)
max. 0.002%
Nitrate (NO3)
max. 0.01%
Calcium (Ca)
max. 0.001%
Zinc (Zn)
max. 0.001%
Magnesium (Mg)
max. 0.001%
Manganese (Mn)
max. 0.001%
Ferrous iron (Fe++)
Passes test
