Physical Properties
Physical state at 20 °C : Solid
Colour : White crystalline
Odour : Odorless
pH value ..................... 8.9 - 9.2 at 50 g/l at 25°C
Melting point ............... 240°C
Decomposition point ... 240°C
Vapour density ............ 4.9
Density ........................ 1.52 g/cm3
Solubility in water ........ Soluble in water
Specifications
Appearance : White crystalline powder
Assay (on anhydrous basis) .... Min 99%
pH (5% solution in water) ........ 8.7 - 9.3
Insoluble matter ....................... Max 0.01%
Chloride (Cl) ............................. Max
0.002%
Nitrogen compounds (as N) ..... Max 0.002%
Sulphate (SO4) ........................ Max 0.005%
Copper (Cu) ............................. Max
0.001%
Iron (Fe) ................................... Max
0.001%
Lead (Pb) ................................. Max
0.001%
Potassium (K) .......................... Max 0.01%
Loss on drying (at 130°C) ........ Max 5.0%
