Sodium bisulphite is a chemical product also known as sodium acid sulphite, monosodium salt of sulphurous acid. Sodium bisulphite is a reducing agent and has many applications: from the reduction of chlorine in photography, to the removal of dissolved oxygen in water transport systems. It also has many uses as a preservative thanks to its reducing capacity, being used in the preservation of onions, wine, fruit juices and bread products.
IDENTIFICATION AND PROPERTIES
Name: Sodium bisulphite
Synonyms: Sodium hydrogen sulphite, Sodium bisulphite liquid, Sodium acid sulphite
CAS: 7631-90-5
EC: 231-548-0
- Appearance: Slightly yellow fluid liquid
- Odour: Weak, pungent, pungent
- pH (100% solution, 20ºC): 3.5-4.5
- Freezing point: <-5ºC
- Boiling point: 105ºC
- Flash point: Non-flammable
- Flammability (solid/gas): Non-flammable
- Explosive limits: Non-explosive
- Vapour pressure (20ºC): <110 kPa
- Density (20ºC): 1.3 - 1.35 g/cm3
- Solubility in water (20ºC): 540 g/l
- Partition coefficient n-octanol/water (Log Pow): -3,7
- Decomposition temperature: 150ºC
- Dynamic viscosity (20ºC): 3.64 mPas
- Explosive properties: Non-explosive
- Oxidising properties: Non-combustive
USES
- Food industry
- Detergency
- Sugar industry
- Paper
- Oil
- Photography
- Tannery
- Textile
- Wood
- Reducing agent in drinking water treatment
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