Sodium carbonate, Na2CO3, is a sodium salt of carbonic acid. The pure product appears as a while, odorless powder with a strong alkaline taste. It has high hygroscopicity. It can be easily dissolved in water to form an aqueous solution with moderate alkalinity.
Sodium carbonate has wide applications in various kinds of fields around the world. One of most important application of sodium carbonate is for the manufacturing of glass. Based on statistics information, about half of the total production of sodium carbonate is used for the manufacturing of glass. During the production of glass, sodium carbonate acts as a flux in the melting of silica. In addition, as a strong chemical base, it is used in the manufacturing of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. In addition, it can also be used for tissue digestion, dissolving amphoteric metals and compounds, food preparation as well as acting as a cleaning agent.
| Name of Product | Sodium carbonate for industrial use (light) | ||
| Reference Standards | GB 210.1-2004 | ||
| Test Items | Standard(II) | ||
| premium grade | First Grade | Qualified products | |
| Total alkali(quality fraction of Na2CO3 dry basis)%≥ | 99.2 | 98.8 | 98.0 |
| Total alkali(quality fraction of Na2CO3 wet basis)%≥ | 97.9 | 97.5 | 96.7 |
| Nacl( quality fraction of Nacl dry basis)%≤ | 0.70 | 0.90 | 1.20 |
| Fe quality fraction(dry basis)%≤ | 0.0035 | 0.006 | 0.010 |
| Water-fast substance in quality fraction%≤ | 0.03 | 0.10 | 0.15 |
| Fe quality fraction(Fe2O3)% | - | - | - |
| Appearance | White crystalline powder | ||
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II