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Sodium Sulfite CAS#7757-83-7

Sodium Sulfite CAS#7757-83-7

Basic Information

Excellent Bleaching and Decolorizing Performance:Effectively used in pulp and papermaking to improve whiteness and product appearance.


Strong Antioxidant and Preservation Function:Helps maintain the fresh look and stability of finished products and formulations.


Versatile Pharmaceutical Additive:Supports the stability and effectiveness of many drug products.


Effective Water Treatment and Environmental Application:Works as an oxygen scavenger and is useful in flue gas desulfurization and photographic processing.


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product description

Product Description of Sodium Sulfite CAS#7757-83-7

Sodium Sulfite (Na₂SO₃) is a water-soluble sodium salt of sulfurous acid, featuring bleaching, desulfurization and dechlorination properties, with extensive industrial applications. It is mainly used in the pulp and paper industry for efficient bleaching, and also serves as an additive to maintain the fresh appearance of finished products. In pharmaceutical preparations, it helps preserve the efficacy and stability of drugs. Additionally, it is applied in water treatment as an oxygen scavenger, flue gas desulfurization, and the maintenance of photographic developer solutions.


Product Application of Sodium Sulfite CAS#7757-83-7

Sodium Sulfite (CAS 7757-83-7) is an inorganic compound with reducing and alkaline properties, widely used in various fields. In chemical and industrial sectors, it is applied for post-bleaching dechlorination in textiles, pulping and digestion processes in papermaking, deaeration in water treatment, chromium-containing wastewater treatment, as well as depilation and softening in the leather industry. In the food and beverage industry, it acts as a preservative, bleaching agent and antioxidant for preserved fruits, fruit juices and other food products, and also serves to regulate fermentation in brewing processes.

Product Information

Parameters


Melting point500 °C
density2.63
bulk density1480kg/m3
refractive index1,484
storage temp.Store at +5°C to +30°C.
solubilityH2O: 1 M at 20 °C, clear, colorless
formSolid
Specific Gravity2.633
colorWhite to slightly yellow
OdorOdorless
PH9.0-10.5 (25℃, 1M in H2O)
PH Range9.0 - 10.5 at 126 g/l at 25 °C
Water Solubility23 g/100 mL (20 ºC)
SensitiveHygroscopic
Merck148,682
Stability:Stable. Incompatible with strong acids. Moisture and air sensitive.
CAS DataBase Reference7757-83-7(CAS DataBase Reference)
NIST Chemistry Referencesodium sulfite(7757-83-7)
EPA Substance Registry SystemSodium sulfite (7757-83-7)
Absorptioncut-off at 265nm in H2O at 1M
Hazard CodesXn
Risk Statements31-36/37/38-22-40-36/38
Safety Statements24/25-36-26-22
WGK Germany1
RTECSWE2150000
F3-10
TSCAYes
HS Code28321000
Hazardous Substances Data7757-83-7(Hazardous Substances Data)
ToxicityLD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951)


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