Products Description
Sodium metabisulfite, with the chemical formula Na₂S₂O₅, is a white crystalline or powdered solid featuring a faint sulfur smell. Inhalation of this substance poses health hazards, and it may trigger severe irritation to skin and bodily tissues. Upon exposure to high temperatures, it undergoes decomposition and emits toxic fumes containing sulfur oxides and sodium oxides.
Products Chemical Properties
| Melting point | >300 °C (lit.) |
| bulk density | 1000-1200kg/m3 |
| density | 1.48 |
| refractive index | 1.474 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 540 g/L (20°C) |
| form | Powder/Solid |
| color | White to slightly yellow |
| Specific Gravity | 1.48 |
| Odor | Sulphorous |
| PH | 3.5-5 (50g/l, H2O, 20℃) |
| PH Range | 4.5 at 50 g/l at 20 °C |
| Water Solubility | 540 g/L (20 ºC) |
| Sensitive | Air & Moisture Sensitive |
| Merck | 14,8638 |
| Exposure limits | ACGIH: TWA 5 mg/m3 NIOSH: TWA 5 mg/m3 |
| Stability: | Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive. |
| InChIKey | HRZFUMHJMZEROT-UHFFFAOYSA-L |
| CAS DataBase Reference | 7681-57-4(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium metabisulfite (7681-57-4) |
Safety Information
| Hazard Codes | Xn,Xi |
| Risk Statements | 22-31-41-36/37/38-52 |
| Safety Statements | 26-39-46-36-16 |
| RIDADR | 3260 |
| OEB | B |
| OEL | TWA: 5 mg/m3 |
| WGK Germany | 1 |
| RTECS | UX8225000 |
| TSCA | Yes |
| HS Code | 2832 10 00 |
| PackingGroup | III |
| Hazardous Substances Data | 7681-57-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg |
Products Application
Sodium metabisulfite (CAS No. 7681-57-4) features powerful reducing properties, which supports its broad application across food, chemical, pharmaceutical and other sectors. Within the food industry, it functions as an antioxidant, preservative and bleaching agent for meat, wine, preserved fruits and similar goods. In chemical manufacturing, it finds use in textile printing and dyeing, paper pulping, water treatment and leather tanning. For pharmaceutical production, it acts as a pharmaceutical intermediate and antioxidant for injectable formulations. Additional application areas include photography, rubber manufacturing and agriculture.
It is worth noting that the compound will release toxic sulfur dioxide upon contact with acids. For proper storage, sodium metabisulfite should be sealed and stored in cool, dry conditions, separated from acids and oxidizing agents.
Company Profile
Furuida (Jinan) Chemical Technology Co., Ltd. is a Shandong, China-based fine chemical enterprise with an integrated platform covering R&D, production, sales, and global service. The company specializes in new chemical materials and is guided by integrity, quality, and customer-first service. Innovation and strict quality management underpin its international expansion, operational improvements, and brand development.
Its experienced foreign trade and technical support team, mature global supply network, and resilient supply chain support annual sales above RMB 600 million and service to more than 5,000 industrial clients. Markets include Asia, Europe, Africa, and Oceania.
The portfolio includes pharmaceutical intermediates and raw materials, food additives, electroplating chemicals, water treatment agents, dye auxiliaries, functional materials, titanium compounds, metal salts, catalysts, and surfactants. Applications cover pharmaceuticals, electronics, coatings, rubber and plastics, fine chemicals, and water treatment. Furuida delivers reliable, cost-effective chemistry and one-stop solutions worldwide.
