Physical Properties Physical state at 20°C : Solid
Colour : White
Odour : Odourless pH value .................................... 4.1-4.5 at 50
g/l at 25°C
Melting point/ Freezing point ..... 212.0
Boiling point ............................... 399.0 Density .......................................
2.04 g/cm3 Solubility in water ....................... Soluble
Specifications Appearance : White crystalline powder Assay (alkalimetric) ...................... 99.0-101.0% pH (5% solution in water; 25°C) ... 4.1 to 4.7 Insoluble matter in water .............. Max 0.05% Nitrogen compounds (as N) ......... Max 0.002% Chloride (Cl) ................................. Max 0.002% Sulphate (SO4) ............................. Max 0.005% Arsenic (As) .................................. Max 0.0001% Calcium (Ca) ................................. Max 0.01% Copper (Cu) .................................. Max 0.001% Iron (Fe) ........................................ Max
0.001% Magnesium (Mg) ........................... Max 0.01% Nickel (Ni) ..................................... Max 0.001% Lead (Pb) ...................................... Max 0.002% | 