|
Appearance
|
White crystalline powder
|
|
Purity (TLC)
|
Min 99%
|
|
Insoluble matter
|
Passes filter test
|
|
Residue on ignition
|
Max 0.05%
|
|
Loss on drying (at 110°C)
|
Max 1%
|
|
Solubility (0.5 M in water; 20°C)
|
Complete,colorless
|
|
pH (0.5 M solution in water; 25°C)
|
5.0 - 6.0
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Chromium (Cr)
|
Max 0.0005%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
UV absorbance 0.05 M in water
|
|
|
at 260 nm
|
Max 0.02
|
|
at 280 nm
|
Max 0.02
|