Appearance (Colour)
White
Appearance (Form)
Crystalline Powder
Solubility (Turbidity) 10% aq. solution
Clear
Solubility (Colour) 10% aq. solution
Colourless
Assay (by Neutralization)
min 99.5%
Water Insoluble matter
max 0.005%
pH (5% aq. solution)
9.1 - 9.3
Chloride (CI)
max 0.001%
Sulphate (SO4)
max 0.005%
Iron (Fe)
max 0.001%
Heavy Metals (Pb)
max 0.001%
Copper (Cu)
max 0.0005%
Potassium (K)
max 0.005%
Absorbance (A) of 0.5M aq. solution in a 1cm cell v/s H2O
.
@260nm
max 0.05
@280nm
max 0.05
