Sodium Metabisulfite
Molecular formula: Na2S2O5
CAS NO: 7681-57-4
Customs Code: 28321000
Appearance: white or yellowish crystalline powder
Whiteness: 85.2
Food grade certification: ISO22000, Halal, kosher
Test items | Standard | Test results |
Na2S2O5:% ≥ | 97 | 98.10 |
SO2 :% ≥ | 65.0 | 66.56 |
Fe :% ≤ | 0.002 | 0.0014 |
As :% ≤ | 0.0001 | 0.0001 |
Insolubler :% ≤ | 0.02 | 0.01 |
Pb :% ≤ | 0.0005 | 0.00048 |
PH: | 4-4.8 | 4.45 |
Purpose:
1. The pharmaceutical industry is used to produce chloroform, phenylpropanesulfone and benzaldehyde.
2. The rubber industry is used as a coagulant.
3. Printing and dyeing industry is used as dechlorination agent for cotton bleaching and cotton scouring assistant.
4. Leather industry is used for leather treatment, which can make leather soft, plump, tough, waterproof, folding resistant, wear-resistant and so on.
5. Chemical industry} is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc. Photosensitive industry is used as developer, etc.
6. The food industry is used as bleach, preservative, loosening agent, antioxidant, color protector and preservative.
Packing:
Food grade polyethylene plastic bags are used for lining and plastic woven bags are used for outer packaging. The net weight of each bag is 25kg or 50kg.
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 moisture. It shall be protected from rain and sunlight 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 breakage. In case of fire, water and various fire extinguishers can be used to put out the fire.
It is used as preservative, bleach and loosening agent in food processing. In industry, sodium pyrosulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium pyrosulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of chloroform, phenylpropanesulfone and benzene formaldehyde. The photographic industry is used as an ingredient for fixing agents. Perfume industry is used to produce vanillin. It is used as preservative in brewing industry, rubber coagulant and dechlorination agent after cotton bleaching. Organic intermediates, dyes and tanning are used as reducing agents, electroplating industry, oilfield wastewater treatment and mineral dressing agent in mines.
IUPAC
Sodium metabisulfite
SMILES
[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]
Shandong, China
