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| Place of Origin: | Hunan |
| Brand Name: | Kemsky |
| Certification: | ISO 9001 SGS |
| Model Number: | sodium sulfite white power 97% purity |
| Minimum Order Quantity: | 1 metric ton |
|---|---|
| Price: | usd 510 per metric ton |
| Packaging Details: | 25 kgs bag,1000 kgs big bag |
| Delivery Time: | 5-8 days |
| Payment Terms: | T/T , L/C |
| Supply Ability: | 3000 tons per month |
| Name: | White Power Sodium Sulfite 97% Purity | Other Name: | Anhydrous Sodium Sulphite White Power 97% Purity |
|---|---|---|---|
| Mesh Size: | 60-80 Mesh | Usage: | Pool Water Treatment |
| Packing: | 25 Kgspaper Bag | Raw Material: | Sulphur |
| High Light: | sodium sulfite photography,sodium sulfite dechlorination |
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ANHYDROUS SODIUM SULFITE FOR WATER TREATMENT
Application
| Pulp and paper industry | Lignin removal agent |
| Water treatment | Oxygen scavenger agent. |
| Photographic industry | To protect developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions. |
| Textile industry | Bleaching, desulfurizing and dechlorinating agent |
| Chemical manufacturing | Sulfonation and sulfomethylation agent. It is used in the production of sodium thiosulfate. |
| Leather trade | The sulfitization of tanning extracts |
| Other applications |
l froth flotation of ores l oil recovery l food preservatives l making dyes l It is used in the purification of TNT for military use. |
Sodium sulfite is primarily used in the pulp and paper industry. It is used in water treatment as an oxygen scavenger agent, to treat water being fed to steam boilers to avoid corrosion problems,[2] in the photographic industry to protect developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions, in the textile industry as a bleaching, desulfurizing and dechlorinating agent and in the leather trade for the sulfitization of tanning extracts. It is used in the purification of TNT for military use. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of sodium thiosulfate. It is used in other applications, including froth flotation of ores, oil recovery, food preservatives, and making dyes.
| Sodium sulfite | |
| Other names | |
| Hypo clear(photography) | |
| E221 | |
| Identifiers | |
| CAS Number | · 7757-83-7 |
| 3D model (JSmol) | · Interactive image |
| ChEBI | · CHEBI:86477 |
| ChemSpider | · 22845 |
| ECHA InfoCard | 100.028.929 |
| EC Number | 231-821-4 |
| E number | E221 (preservatives) |
| PubChem CID | · 24437 |
| RTECS number | WE2150000 |
| UNII | · VTK01UQK3G |
| InChI[show] | |
| SMILES[show] | |
| Properties | |
| Chemical formula | Na2SO3 |
| Molar mass | 126.043 g/mol |
| Appearance | white solid |
| Odor | odorless |
| Density | 2.633 g/cm3 (anhydrous) |
| 1.561 g/cm3 (heptahydrate) | |
| Melting point | 33.4 °C (92.1 °F; 306.5 K) (dehydration of heptahydrate) |
| 500 °C (anhydrous) | |
| Boiling point | Decomposes(separate (substances) into constituent elements) |
| Solubility in water | 27.0 g/100 mL water (20 °C) |
| Solubility | soluble in glycerol insoluble in ammonia,chlorine |
| log P | -4 |
| Acidity (pKa) | ~9 (heptahydrate) |
| Refractive index(nD) | 1.565 |
| Structure | |
| Crystal structure | hexagonal (anhydrous) |
| monoclinic (heptahydrate) | |
| Hazards | |
| Safety data sheet | ICSC 1200 |
Sodium sulfite is decomposed by even weak acids, giving up sulfur dioxide gas.
Na2SO3 + 2 H+ → 2 Na+ + H2O + SO2
A saturated aqueous solution has pH of ~9. Solutions exposed to air are eventually oxidized to sodium sulfate. If sodium sulfite is allowed to crystallize from aqueous solution at room temperature or below, it does so as a heptahydrate. The heptahydrate crystals effloresce in warm dry air. Heptahydrate crystals also oxidize in air to form the sulfate. The anhydrous form is much more stable against oxidation by air.
Sodium sulfite forms a bisulfite adduct with aldehydes, and with ketones forms a sulfonic acid. It is used to purify or isolate aldehydes and ketones.
Sodium sulfite (sodium sulphite) is a soluble sodium salt of sulfurous acid (sulfite) with the chemical formula Na2SO3. It is a product of sulfur dioxide scrubbing, a part of the flue-gas desulfurization process. It is also used as a preservative to prevent dried fruit from discoloring, and for preserving meats, and is used in the same way as sodium thiosulfate to convert elemental halogens to their respective hydrohalic acids, in photographyand for reducing chlorine levels in pools.
Sodium Sulfite is a white crystal or powder with reducing property. Sodium sulfite exhibits bleaching, de-sulfurizing, and dechlorinating activities. This agent was used by food industry to help maintain the fresh appearance of food products. It is also a component in many drugs, which helps maintain their potency and stability. FDA has ruled sodium sulfite a new animal drug of low regulatory priority.
SODIUM SULFITE is a white odorless powder. Density 2.633 g / cm3. Moderately toxic. Sinks in water and dissolves slowly. Also transported as a heptahydrate Na2SO3.7H2O.
Contact Person: Mrs. Kim Xie
Fax: Ningbo Keyuan Holdings Group
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