Appearance (Colour)
White
Appearance (Form)
Crystalline hygroscopic powder
Solubility (Turbidity) 10% aq. solution
Clear
Solubility (Colour) 10% aq. solution
Colourless
Assay (by Neutralization)
min. 99.5%
pH (5% aq. solution)
8.5 - 9.6
Loss on drying
max. 1%
Chloride (CI)
max. 0.001%
Sulphate (SO4)
max. 0.005%
Iron (Fe)
max. 0.001%
Heavy Metals (Pb)
max. 0.0005%
Copper (Cu)
max. 0.0005%
Sodium (Na)
max. 0.05%
Nitrogen Compounds (N)
max. 0.001%
Absorbance (A) of 10% aq. solution in a 1cm cell v/s H2O
@230nm
max. 0.1
@240nm
max. 0.06
@250 nm
max. 0.04
@310nm
max. 0.02
@500nm
max. 0.02
