Sodium Sulfite CAS#7757-83-7
Bleaching Agent: Sodium sulfite is widely used in the pulp and papermaking industries for its effective bleaching properties, maintaining product brightness.
Pharmaceutical Stability: It plays a crucial role in maintaining the stability and efficacy of medications, making it valuable in the pharmaceutical industry.
Water Treatment: As an oxygen scavenger, sodium sulfite is essential in water treatment, helping to improve water quality.
Flue Gas Desulfurization: Sodium sulfite is used in flue gas desulfurization, contributing to environmental protection by reducing sulfur emissions.
Sodium sulfite (Na2SO3), a soluble sodium salt of sulfurous acid, possesses bleaching, de-sulfurizing, and dechlorinating properties, making it widely used across various industries. Its primary application is in the pulp and papermaking sector, where it acts as a bleaching agent.
Sodium sulfite is also effective in maintaining the bright appearance of specific products. Additionally, it plays a crucial role in the pharmaceutical industry, contributing to the stability and efficacy of medications. Furthermore, sodium sulfite is employed as an oxygen scavenger in water treatment, as well as in flue gas desulfurization and the maintenance of photographic developer solutions.
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 | Solid |
Specific Gravity | 2.633 |
color | White to slightly yellow |
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) |
