Sodium metabisulfite/CAS: 7681-57-4
Short Description:
Product Name: Sodium metabisulfite
CAS: 7681-57-4
MF:H2O5S2.2Na
MW:192.12
STRUCTURE:
specification
|
Item |
Specification |
| Melting Point | >300 °C (lit.) |
| Density | 1.48 |
| Bulk Density | 1000-1200kg/m3 |
| Refractive Index | 1.474 |
| Storage Conditions | Store at +5°C to +30°C. |
| Solubility | 540g/l（20°C） |
| Form | Powder/Solid |
| Color | White to slight yellow |
| pH value | 3.5-5 (50g/l, H2O, 20℃) |
| Water Solubility | 540 g/L (20 ºC) |
| PH range of acid-base indicator color change | 4.5 at 50 g/l at 20 °C |
Sodium metabisulfite is a white or yellow crystalline powder or small crystal with a strong SO2 odor. Its aqueous solution is acidic and releases SO2 upon contact with strong acids, generating corresponding salts. If left in the air for a long time, it oxidizes to Na2S2O6, so this product cannot be stored for a long time.
Usage
Used as preservatives, bleaching agents, and loosening agents in food processing. Sodium metabisulfite is used in industries such as printing and dyeing, organic synthesis, printing, leather making, pharmaceuticals, etc; Sodium metabisulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethoxazole metamaterial, caprolactam, as well as for the purification of chloroform, phenylpropanoid sulfone, and benzaldehyde. Used as a fixative ingredient in the photographic industry. The spice industry is used to produce vanillin. Used as a preservative in the brewing industry, a rubber coagulant, and a dechlorination agent for bleached cotton fabrics. Organic intermediates, dyes, leather used as reducing agents, used in electroplating industry, wastewater treatment in oil fields, and used as mineral processing agents in mines.
Packaging and Shipping
25KG/Drum or as customer requirements.
Belongs to common goods and can deliver by ocean and air
Keep and storage
Shelf life:24 month from date of manufacture in original unopened packaging stored in a cool dry place out of direct sunlight, water.
Ventilated warehouse, Low temperature drying, Separated from oxidants, acids.
