Sodium metabisulfite (Naâ‚‚Sâ‚‚Oâ‚…) is an inorganic compound widely used as a preservative, antioxidant, and disinfectant. It is a common food additive added to dried fruits, potato chips, raisins, vegetables, seafood, juices, and alcoholic beverages to prevent microbial spoilage and maintain overall quality.Â
Sodium metabisulfite is also used in cosmetic preparations, such as hair dyes, shampoos, and skin care products.Â
CAS No.: 7681-57-4 ,7757-74-6
Synonyms: Sodium metabisulfite [NF], Disodium pentaoxodisulfate, Sodium pyrosulfite, Pyrosulfurous acid, Disodium metabisulfite, Disodium pyrosulfite, Natriummetabisulfit
| Physical Properties | |
| Chemical formula | Na2S2O5 |
| IUPAC name | Disodium disulfite |
| Molar mass | 190.107 g/mol |
| Solubility | Soluble in water, slightly soluble in ethanol and glycerol |
| Odor | Faint sulfur-like odor |
| Density | 1.48 g/cm3 |
| Chemical Properties | |
| Color | White to yellowish |
| Appearance | Crystalline or powder form |
| Boiling point | Decomposes before boiling |
| Melting point | ~170 °C (decomposes) |
| Specific gravity | 1.4 |
| pH | ~4.5 |
Common side effectsÂ
Prolonged use of sulfite may lead to serious health issues such as –Â
| Pictograms : |
|
| Hazard Statements : | H302 Harmful if swallowed H318 Causes serious eye damage |
| Precautionary statements : | P264 Wash exposed skin thoroughly after handling. P270 Do not eat, drink, or smoke when using this product. P280 Wear eye protection/face protection. P301 + P312 IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P501 Dispose of contents/ container to an approved waste disposal plant. |
Sodium metabisulfite (Naâ‚‚Sâ‚‚Oâ‚…) is an inorganic compound widely used as a preservative, antioxidant, and disinfectant. It is a common food additive added to dried fruits, potato chips, raisins, vegetables, seafood, juices, and alcoholic beverages to prevent microbial spoilage and maintain overall quality.Â
Sodium metabisulfite is also used in cosmetic preparations, such as hair dyes, shampoos, and skin care products.Â
CAS No.: 7681-57-4 ,7757-74-6
Synonyms: Sodium metabisulfite [NF], Disodium pentaoxodisulfate, Sodium pyrosulfite, Pyrosulfurous acid, Disodium metabisulfite, Disodium pyrosulfite, Natriummetabisulfit
| Physical Properties | |
| Chemical formula | Na2S2O5 |
| IUPAC name | Disodium disulfite |
| Molar mass | 190.107 g/mol |
| Solubility | Soluble in water, slightly soluble in ethanol and glycerol |
| Odor | Faint sulfur-like odor |
| Density | 1.48 g/cm3 |
| Chemical Properties | |
| Color | White to yellowish |
| Appearance | Crystalline or powder form |
| Boiling point | Decomposes before boiling |
| Melting point | ~170 °C (decomposes) |
| Specific gravity | 1.4 |
| pH | ~4.5 |
Common side effectsÂ
Prolonged use of sulfite may lead to serious health issues such as –Â
| Pictograms : |
|
| Hazard Statements : | H302 Harmful if swallowed H318 Causes serious eye damage |
| Precautionary statements : | P264 Wash exposed skin thoroughly after handling. P270 Do not eat, drink, or smoke when using this product. P280 Wear eye protection/face protection. P301 + P312 IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P501 Dispose of contents/ container to an approved waste disposal plant. |
Sodium metabisulfite is recognised as GRAS (Generally Recognized as Safe), and it is FDA-approved for food ingredients.
Sodium metabisulfite is safe as a food additive and widely used as a preservative and antioxidant for dried fruits, seafood, wines, and beverages.
Sodium metabisulfite is not found naturally; it is made synthetically by the reaction of sodium hydroxide and sulfur dioxide.
Sodium metabisulfite is added to a variety of foods, such as dried fruits, processed potatoes, canned vegetables, and seafood like lobster and shrimp. It also added hair dyes and skin care creams.
