| Customization: | Available |
|---|---|
| CAS No.: | 7681-57-4 |
| Formula: | Na2o5s2 |
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| Density |
Melting point: |
logP: | Appearance: |
Storage | Colour | Physical properties | Solubility | Storage temperature | pH value |
| 1.48 | 150ºC | 0.27220 | White crystalline powder |
White crystalline powder Storage It should be stored in a cool and dry warehouse. The packaging should be sealed to prevent oxidation by air. 2. Pay attention to moisture prevention. It should be protected from rain and direct sunlight during transportation. It is strictly prohibited to store or transport together with acids, oxidants and toxic and harmful substances. In case of fire, water and various fire extinguishers can be used to put it out. |
Colorless or yellowish-brown, liquid or solid |
White or slightly yellowish crystalline powder. It is soluble in water and the aqueous solution is acidic. Soluble in glycerol, slightly soluble in ethanol. | 540 g/L (20°C) | The warehouse should be well-ventilated, low-temperature and dry, and stored and transported separately from oxidants and food |
pH value Aqueous solution is acid |
| 1.It is used as a chromatographic analysis reagent, preservative and reducing agent, and is applied in the dye and pharmaceutical industries |
| 2. It is used as a bleaching agent, mordant, reducing agent, rubber coagulant, and also in organic synthesis, pharmaceuticals and fragrances, etc |
| 3. In the pharmaceutical industry, it is used to produce chloroform, phenylsulfoxide and benzaldehyde. It is used as a coagulant in the rubber industry. It is used in the printing and dyeing industry as a dechlorinating agent after bleaching cotton fabric and as an auxiliary agent for boiling cotton fabric. In the leather industry, it is used for leather processing, which can make the leather soft, plump and tough, and has properties such as water resistance, anti-folding and wear resistance. The chemical industry uses it to produce hydroxyvanillin, hydroxylamine hydrochloride, etc. It is used in the photosensitive industry as a developer, etc. Sodium metabisulfite has a stronger reducing property than sulfite and its effect is similar to that of sodium sulfite. In China, it is stipulated that it can be used in preserved fruits, biscuits, table sugar, rock sugar, maltose, candies, glucose, liquid glucose, bamboo shoots, mushrooms and canned mushrooms, with a maximum usage of 0.45g/kg. The residue levels (calculated as SO2) of preserved fruits, bamboo shoots, mushrooms and mushroom cans, grape and blackcurrant concentrates are less than 0.05/kg. The residue amounts of biscuits, sugar, vermicelli and other varieties are less than 0.1g/kg. The residual amount of liquid glucose shall not exceed 0.2g/kg. |
| 4.Sodium metabisulfite has a stronger reducing property than sulfite and its effect is similar to that of sodium sulfite. In China, it is stipulated that it can be used in preserved fruits, biscuits, table sugar, rock sugar, maltose, candies, glucose, liquid glucose, bamboo shoots, mushrooms and canned mushrooms, with a maximum usage of 0.45g/kg. The residue levels (calculated as SO2) of preserved fruits, bamboo shoots, mushrooms and mushroom cans, grape and blackcurrant concentrates are less than 0.05/kg. The residue amounts of biscuits, sugar, vermicelli and other varieties are less than 0.1g/kg. The residual amount of liquid glucose shall not exceed 0.2g/kg. |
| 5. In the food industry, it is used as a bleaching agent, preservative, leavening agent, antioxidant, color protector and fresh-keeping agent. |
| 6. It is used in industries such as dyeing and printing, organic synthesis, printing, leather tanning, and pharmaceuticals. It is used as a preservative, bleaching agent and leavening agent in food processing. |
| 7. For analysis purposes. Anti-corrosion agent. Reducing agent. Antioxidant |
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