Products Description of Sodium sulfite CAS#7757-83-7
Sodium sulfite (Na₂SO₃) is usually a white crystalline powder with no odor. It is highly soluble in water and slightly soluble in ethanol. It has strong reducing properties. It is prone to absorb moisture in the air and gradually oxidizes into sodium sulfate; it will rapidly decompose in the presence of strong acids and release sulfur dioxide gas.
Parameters
Melting point | 500 °C |
density | 2.63 |
bulk density | 1480kg/m3 |
refractive index | 1,484 |
storage temp. | Store at +5°C to +30°C. |
solubility | H2O: 1 M at 20 °C, clear, colorless |
form | Powder |
Specific Gravity | 2.633 |
color | White |
Odor | Odorless |
PH | 9.0-10.5 (25℃, 1M in H2O) |
PH Range | 9.0 - 10.5 at 126 g/l at 25 °C |
Water Solubility | 23 g/100 mL (20 ºC) |
Sensitive | Hygroscopic |
Merck | 14,8682 |
Stability: | Stable. Incompatible with strong acids. Moisture and air sensitive. |
CAS DataBase Reference | 7757-83-7(CAS DataBase Reference) |
NIST Chemistry Reference | sodium sulfite(7757-83-7) |
EPA Substance Registry System | Sodium sulfite (7757-83-7) |
Absorption | cut-off at 265nm in H2O at 1M |
Safety Information
Hazard Codes | Xn |
Risk Statements | 31-36/37/38-22-40-36/38 |
Safety Statements | 24/25-36-26-22 |
WGK Germany | 1 |
RTECS | WE2150000 |
F | 3-10 |
TSCA | Yes |
HS Code | 28321000 |
Hazardous Substances Data | 7757-83-7(Hazardous Substances Data) |
Toxicity | LD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951) |
Product Application of Sodium sulfite CAS#7757-83-7
Sodium sulfite (CAS No. 7757-83-7) is an inorganic compound with reducibility and alkalinity, and its applications are widespread. In chemical and industrial fields, it has multiple uses: dechlorinating textiles after bleaching, aiding pulping and cooking in the paper industry, deaerating water during water treatment, treating chromium-containing wastewater, and removing hair and softening materials in the leather industry. In the food and beverage industry, it acts as a preservative, bleaching agent, and antioxidant for products like preserved fruits and fruit juices, and also helps regulate fermentation in the brewing process.
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