Appearance (Colour)
White
Appearance (Form)
Crystalline powder
Solubility (Turbidity) 10% hot aq. solution
Clear
Solubility (Colour) 10% hot aq. solution
Colourless
Assay (T)
min. 99%
pH (2% aq. solution)
3.0 - 4.5
Loss on drying
max. 0.2%
Sulphated Ash
max. 0.1%
Chloride (CI)
max. 0.05%
Sulphate (SO4)
max. 0.005%
Iron (Fe)
max. 0.0005%
Heavy Metals (Pb)
max. 0.0005%
Absorbance (A) of 2% aq. solution in a 1cm cell v/s H2O
@250 nm
max. 0.05
Absorbance (A) of 0.5M aq. solution in a 1cm cell v/s H2O
@260nm
max. 0.05
@280nm
max. 0.05