Anhydrous Sodium Sulfite CAS#7757-83-7
Anhydrous sodium sulfite is a widely used inorganic chemical with high water solubility. Its aqueous solution is alkaline, and solubility increases with temperature—for example, 12.54 g/100 ml at 0 °C and 283 g/100 ml at 80 °C. It is insoluble in ethanol and nearly insoluble in ether. The compound has a relatively high melting point and is not prone to spontaneous combustion.
Sodium sulfite Chemical Properties
| Melting point | 500 °C |
| density | 2.63 |
| bulk density | 1480kg/m3 |
| refractive index | 1484 |
| 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 Range | 9.0 - 10.5 at 126 g/l at 25 °C |
| PH | 9.0-10.5 (25℃, 1M in H2O) |
| Water Solubility | 23 g/100 mL (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 148682 |
| 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 |
| 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 | 46091 |
| TSCA | Yes |
Product Usage
Anhydrous sodium sulfite, an inorganic compound characterized by strong reducing properties, serves a wide range of applications across multiple industries.
Industrial-grade material is employed for decolorization and filtration in dyeing and printing processes.
Food-grade product acts as a compliant additive for preserving fruits, vegetables, and seafood.
Photographic-grade material is utilized in the development stage within the photosensitive industry.
Pharmaceutical-grade product functions as an intermediate in the manufacture of chloroform, benzaldehyde, and other drugs.
Beyond these, it is also extensively applied in papermaking, electronics, and various other industrial sectors.
Company Profile
Furuida (Jinan) Chemical Technology Co., Ltd., headquartered in Shandong, China, is a fine chemical manufacturer whose business spans R&D, production, sales, and global service. The company has built its reputation on advanced chemical materials, and it approaches business with a clear set of commitments: integrity in every deal, uncompromising standards in every product, and service treated as an ongoing partnership. Innovation is something the company practices rather than advertises, and quality is protected with strict discipline at every stage of the process. Guided by these principles, Furuida continues to expand its international presence, sharpen its internal operations, and strengthen a brand that customers trust without second thoughts.
The company's progress is fueled by its team—seasoned professionals with deep experience in international trade and technical problem-solving—backed by a global supply network that has matured to the point of balancing reliability with rapid response. Today, annual sales have surpassed RMB 600 million, and lasting ties have been formed with more than 5,000 industrial clients across Asia, Europe, Africa, and Oceania. This level of global engagement has earned Furuida not only strong customer loyalty but also a respected voice throughout the chemical industry.
Furuida's product offering is both expansive and adaptable, covering pharmaceutical intermediates, food additives, electroplating chemicals, water treatment agents, dye auxiliaries, functional new materials, titanium compounds, metal salts, catalysts, and surfactants. These products support a wide range of industries, including pharmaceuticals, electronics, coatings, rubber and plastics, specialty chemicals, and water treatment. Building on this broad foundation, Furuida remains committed to delivering consistent, competitively priced chemical products and complete one-stop solutions to customers worldwide—solutions that are continually refined to meet the specific and evolving demands of the global market.
