|Clarity of solution||A 10% solution in water is clear, appendix 6.1.|
|Chlorides||Not more than 330 ppm|
|Sulphate||Not more than 0.12%|
|Water||Not more than 5.0%|
|Assay on dried basis||As C10H11NaO3)|
|Additional Test||Loss on drying, w/w|
|PH||Between 9.5 to 10.5, determined in a 0.1% w/v solution, appendix 8.11|
Description : A white, crystalline powder, odourless or almost odourless; hygroscopic.
Solubility : Freely soluble in water and in ethanol (50%), sparingly soluble in ethanol (95%), practically in soluble in fixed oils.