Appearance (Colour)
White
Appearance (Form)
Crystalline powder
Solubility (Turbidity) 10% aq. solution
Clear
Solubility (Colour) 10% aq. solution
Colourless
Assay (NT)
min. 99.5%
pH (5% aq. solution)
7.5 - 9.2
Substances reducing Permanganate (O)
max. 0.005%
Water Insoluble matter
max. 0.001%
Chloride (CI)
max. 0.0005%
Sulphate (SO4)
max. 0.002%
Iron (Fe)
max. 0.0005%
Heavy Metals (Pb)
max. 0.001%
Copper (Cu)
max. 0.0005%
Phosphate (PO4)
max. 0.0002%
Potassium (K)
max. 0.005%
Absorbance (A) of 0.5M aq. solution in a 1cm cell v/s H2O
@250 nm
max. 0.05
@300nm
max. 0.03
@350nm
max. 0.02
@500nm
max. 0.01
