Sodium Metabisulfite
Chemical name: sodium pyrosulfite
Molecular formula: Na2S2O5
Nature: 7681-57-4
Customs Code: 28321000
Appearance: white or yellowish crystalline powder
Whiteness: 85.2
| Testing items | Standard | Detection result |
|---|---|---|
| Main content（Na2S2O5）:% | ≥97 | 98.20 |
| Sulfur dioxide（SO2）:% | ≥65.0 | 66.66 |
| Iron（Fe）:% | ≤0.002 | 0.0013 |
| Arsenic（As）:% | ≤0.0001 | 0.0001 |
| Water insoluble matter :% | ≤0.02 | 0.01 |
| Lead（PB）L:% | ≤0.0005 | 0.00046 |
| PH: | 4-4.8 | 4.45 |
Purpose:
1. The pharmaceutical industry is used to produce chloroform, phenylpropanesulfone and benzaldehyde.
2. Rubber industry is used as coagulant.
3. The printing and dyeing industry is used as dechlorination agent and scouring agent for cotton after bleaching.
4. The leather industry is used for leather treatment, which can make leather soft, plump and tough, with water-proof, folding resistant and wear-resistant properties.
5. The chemical industry is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc. The photosensitive industry is used as developer, etc.
6. Food industry is used as bleaching agent, preservative, loosening agent, antioxidant, color protecting agent and preservative. China's regulations can be used for candied fruits, biscuits, sugar, ice sugar, caramel, candy, glucose, liquid glucose, bamboo shoots, mushrooms and canned mushrooms, with the maximum use of 0.45g/kg. The residues of preserved fruits, bamboo shoots, mushrooms and canned mushrooms, grapes and black currant concentrate (calculated by S0 ψ) are. 05g / kg; the residues of biscuits, sugar, vermicelli and other varieties are less than 0.1g/kg; the residues of liquid glucose are not more than 0.2g/kg.
Packing:
Food grade polyethylene plastic bags are used for inner lining and plastic woven bags for outer packaging, with net weight of 25kg or 50kg each "Food additive sodium pyrosulfite" and "moisture and heat proof" logo are printed on the outside of the package, and the trademark is "Jinxiang".
Storage and protection:
It shall be stored in a cool and dry warehouse. The package shall be sealed to prevent air oxidation. Pay attention to dampproof. Rain and sunlight shall be protected during transportation. It is strictly prohibited to store and transport together with acids, oxidants and harmful and toxic substances. The storage period should be six months from the date of production. Handle with care during loading and unloading to prevent package from cracking. In case of fire, water and various fire extinguishers can be used to put out the fire.