Details:
Sodium sulfite Basic information |
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Sodium sulfite Chemical Properties |
mp |
500 °C |
density |
2.63 |
refractive index |
1,484 |
storage temp. |
Store at RT. |
solubility |
H2O: 1 M at 20 °C, clear, colorless |
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) |
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Sodium sulfite Usage And Synthesis |
Chemical Properties |
white crystals or powder |
General Description |
White odorless powder. Density 2.633 g / cm3. Moderately toxic. Sinks in water and dissolves slowly. Also transported as a heptahydrate Na2SO3.7H2O. |
Air & Water Reactions |
Soluble in water. Reacts with hot water, steam or acids to produce corrosive material. |
Reactivity Profile |
Sodium sulfite is a reducing agent, particularly under basic conditions. Reacts with oxidizing agents such as peroxides, epoxides, oxoacids. Emits toxic fumes of sodium oxide and oxides of sulfur if heated to decomposition [Lewis, 3rd ed., 1993, p. 1174]. |
Health Hazard |
When ingested, solutions cause gastric irritation by the liberation of sulfurous acid. Because of rapid oxidation to sulfate, sulfites are well tolerated until large doses are reached; then violent colic and diarrhea, circulatory disturbances, central nervous depression, and death can occur. |
Fire Hazard |
Literature sources indicate that Sodium sulfite is noncombustible. |
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Sodium sulfite Preparation Products And Raw materials |
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