1 | Appearance | Almost white slightly granular hygroscopic. | A white or colourless or almost white, slightly granular or fine powder, hygroscopic.(USP/Ph.Eur) |
2 | Solubility | Passes | Freely soluble in water, more soluble in boiling water, practically insoluble in ethanol (96%) (USP/Ph.Eur) |
3 | Identification A (By Chemical test) | Passes | The solution should be strongly alkaline.(Ph.eur) |
4 | Identification B (By Chemical test) | Passes | Gives reaction of carbonate. (Ph.Eur) |
5 | Identification C (By Chemical test) | Passes | Gives reaction (a) of sodium. (Ph.Eur) |
6 | Identification D (By Loss on drying) | 0.09% | 1.0% w/w max (Ph.Eur) |
7 | Identification A | Passes | Gives positive test for sodium (USP) |
8 | Identification B | Passes | Gives positive test for carbonate (USP) |
9 | Appearance of solution | Passes | The solution should be clear and not more intensely coloured than reference solution Y6. (Ph.Eur) |
10 | Alkali hydroxides and bicarbonates | Passes | The solution does not become red with berium chloride solution and phenolphthalein solution. Boil the remainder of the filtrate for 2 minutes. The solution remaints clear. (Ph.eur) |
11 | Chloride (Cl) | NMT 125 ppm | Not more than 125ppm (Ph.Eur) |
12 | Sulphate(SO4) | NMT 250 ppm | Not more than 250ppm (Ph.Eur) |
13 | Arsenic (As) | NMT 5 ppm | Not more than 5ppm (Ph.Eur) |
14 | Iron (Fe) | NMT 50 ppm | Not more than 50ppm (Ph.Eur) |
15 | Heavy metals | NMTr 10 ppm | Not more than 10ppm (USP/Ph.Eur) |
16 | Loss on drying | 0.09% | 1.0% w/w (Ph.Eur) |
17 | Water | 0.09% | 0.5% max (USP) |
18 | Assay (Dried substance) | 99.94% | 99.50% to 100.50% (USP/Ph.Eur) |
19 | Particle size | Passes | 100% of the material should be pass through 40# |