Español
العربية
Francés
Русский
Português
Deutsch
Italiano
Kazakh
Uzbek
Sodium metabisulfite CAS#7681-57-4
CAS Number:7681-57-4
Chemical Formula: C9H14O6
Synonyms:
SodiumMetabisulphiteExtraPure
Sodiummetabisufite;SodiumMetabisulphiteAcs
SO2 58.5% min
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Appearance: White Solid
Sodium metabisulfite CAS#7681-57-4
Sodium metabisulfite (chemical formula: Na2S2O5) appears as a white crystalline or powder solid with a slight sulfur odor. It is toxic upon inhalation and can strongly irritate skin and tissue. It can be decomposed to release toxic oxide fumes of sulfur and sodium upon high temperature. It can be mixed with water to form a corrosive acid. It is generally used as disinfectant, antioxidant, and preservative agent as well as a laboratory reagent. As a kind of food additive, it can be used as a preservative and antioxidant in food. It can also be applied to the wine and beer making. Moreover, it can be used to sanitize the equipment of homebrew and winemaking as a cleaning agent. It also have various kinds of other applications, e.g. being applied to photography, as an excipients in some tablets, for water treatment, as a source of SO2 in wine, as a bactericide and as a bleaching reagent as well as reducing agent. It can be manufactured through the evaporation of a sodium bisulfite which has been saturated with sulfur dioxide. It should be warned that sodium metabisulfite has certain acute effects on the respiratory system, eyes and skin. In severe case, it can cause breathing difficulty and even pulmonary damage which finally leads to death. Therefore, effective protective measures and attention should be taken during the operation.
| Sodium metabisulfite 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. |
| Cosmetics Ingredients Functions | PRESERVATIVE REDUCING ANTIOXIDANT |
| 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 |
Product Application of Sodium metabisulfite CAS#7681-57-4
Sodium metabisulfite (SMBS, Sodium disulfite) is a white, granular solid sodium salt. an inorganic compound made up of sodium, sulfur, and oxygen, and used in many industries:
in the pulp and paper industry, in the photographic industry and in the various other industries as a bleach or dechlorinator.
Food Grade sodium metabisulfite may be used as a food preservative. It is also commonly added to various food products and wines as a preservative.
Sodium metabisulfite can also be used in the manufacture of other chemicals, Used in production of cleaning agents, detergents, and soaps.
Factory and Equipment Show
Fast delivery time
Inventory 2-3 working days New production 7-10 working days
