Products Description
Sodium sulfite (Na₂SO₃) is typically an odorless, white crystalline powder. It is highly soluble in water and slightly soluble in ethanol. It exhibits strong reducing properties. The substance is hygroscopic and tends to absorb moisture from the air, gradually oxidizing to sodium sulfate. In the presence of strong acids, it decomposes rapidly and releases sulfur dioxide gas.
Products Chemical Properties
| 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) |
Products Application
Sodium sulfite (CAS 7757-83-7) is an inorganic reducing alkali compound with extensive industrial applications. It is used for textile post-bleaching dechlorination, paper pulp cooking, water deaeration and chromium wastewater treatment, as well as leather unhairing and softening. In food and beverage manufacturing, it acts as a preservative, bleaching agent and antioxidant for preserved fruits and fruit juices, and regulates fermentation in brewing.
Company Profile
Furuida (Jinan) Chemical Technology Co., Ltd. delivers reliable, cost-effective chemical solutions and comprehensive one-stop services to global partners. That is the outcome. The means are integrated R&D, production, sales, and global service focused on new chemical materials. The foundation is integrity, quality, and customer-first service. The driver is continuous innovation, strict quality management, international expansion, higher operational standards, and brand building.
The scale is significant: annual sales above RMB 600 million, over 5,000 industrial clients, and markets across Asia, Europe, Africa, and Oceania. The support system includes an experienced foreign trade and technical support team, a mature global supply network, and resilient supply chain capabilities.
The portfolio spans pharmaceutical intermediates and raw materials, food additives, electroplating chemicals, water treatment agents, dye auxiliaries, functional materials, titanium compounds, metal salts, catalysts, and surfactants. Applications include pharmaceuticals, electronics, coatings, rubber and plastics, fine chemicals, and water treatment.
