CASR |
: | 497-19-8 |
Molecular Formula |
: | Na2CO3 |
Molecular Weight |
: | 105.99 |
| Specifications | |
|---|---|
| Appearance: | A white or colourless or almost white, slightly granular or fine powder, hygroscopic. |
| Solubility: | Freely soluble in water, more soluble in boiling water practically insoluble in ethanol (96%) |
| Identification(Sodium): | A dense whiter precipitate should form. |
| Identification (Carbonate 1): | Effervesce with acids, evolves a colorless gas that when pass into calcium hydroxide solution produces white precipitate immediately |
| Identification (Carbonate 2): | A cold solution should be colored red by phenolphthalein solution |
| Identification (Carbonate 3): | A white precipitate should form that dissolves on addition of an excess of hydrochloric acid |
| Identification (By chemical test): | The solution should be strongly alkaline. |
| Identification (By Loss on drying): | 1.0% max |
| Appearance of Solution: | The solution should be clear and not more intensely colored than reference solution Y6. |
| Alkali hydroxides & bicarbonates: | The solution should remain clear. |
| Chloride (Cl): | Not more than 125ppm |
| Sulphate(SO4): | Not more than 250ppm |
| Arsenic (As): | Not more than 5ppm |
| Iron(Fe): | Not more than 50ppm |
| Loss on drying: | 1.0% w/w |
| Water: | 0.5% max |
| Assay (Dried substance): | 99.50% to 100.50% |
| Particle size: | 100% of the material should pass through 40# |
