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Industrial Grade Sodium Metabisulfite Powder, Sodium Pyrosulfite Manufacturers
| Product Name: | Sodium Metabisulfite |
| CAS: | 7681-57-4 |
| MF: | 2Na.O5S2 |
| MW: | 190.11 |
| EINECS: | 231-673-0 |
| Mol File: | 7681-57-4.mol |
| Sodium metabisulfite Chemical Properties | |
| Melting point | >300 °C (lit.) |
| density | 1.48 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 540 g/L (20°C) |
| form | Powder/Solid |
| color | White to slightly yellow |
| Specific Gravity | 1.48 |
| Odor | Sulphorous |
Sodium metabisulfite is white or yellow crystalline powder or small crystal, with a strong SO2 odor, soluble in water, the aqueous solution is acidic, when contacted with strong acid, SO2 is released to form corresponding salts, and it is oxidized to Na2S2O6 when placed in the air for a long time. Therefore, the product cannot be stored for a long time. Above 150 degrees Celsius, SO2 is decomposed.
| Item | Specification | Test |
| CONTENT(AS Na2S2O5): | 97%min | 97.5% |
| HEAVY METAL(Pb): | 0.0005%max | 0.0002% |
| IRON (Fe): | 0.005%max | 0.004% |
| ARSENIC(As): | 0.0001%max | 0.00007% |
| WATER INSOLUBLE: | 0.05%max | 0.04% |
| CLARITY: | PASSES TEST | QUALIFIED |
| Appearance | WHITE CRYSTALLINE FINE PARTICLES | |
| Industrial Grade Sodium Metabisulfite | ||
| Item | Specification | Result |
| Na2S2O5 | 96.5%Min | 97.18% |
| SO2 | 65.0%Min | 65.53% |
| Fe | 0.003%Max | 0.002% |
| As | 0.0001% Max | 0.0001% |
| Water Insoluble Matter | 0.05% Max | 0.01% |
| 1 | Used in wide range of industrial and municipal waste water treatment. |
| 2 | Used in pulp and paper making. |
| 3 | Used in mining industry. |
| 4 | Used in production of cleaning agents, detergents ans soaps. |
| 5 | Used in sterilizing the equipment in beer and wine manufacturing. |
| 6 | Used in water reducing agent for concrete admixture in construction industry. |
| 7 | Used in dye industry. |
| 8 | Used in oil field production and disinfection. |
| 9 | Used in removal of tree stumps in landscape gardening. |
| 10 | Used in water treatment in leather tanning process. |
| 11 | Used in food preservative for dried foods |
For sodium metabisulfite, please only contact to
Bella Cheng
E-mail: sales08@yixinchemical.com
WhatsApp/Wechat: 0086 15705596714