Sodium Metabisulfite BP
Abstract:
Sodium metabisulfite or sodium pyrosulfite is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium metabisulfite. Sodium metabisulfite appears as a white crystalline or powder solid with a slight sulfur odor.
Uses/Applications:
It is used as a disinfectant, antioxidant, and preservative agent. It can be used to preserve color of some fruits, such as bananas. It is commonly used in homebrewing and winemaking to sanitize equipment.
Identity:
Molecular Formula: Na2S2O5
Molecular Weight: 190.1 g/mol
CAS No.: 7681-57-4
Other name: Sodium Pyrosulphite
Specifications:
| Test | Specification |
| Characters | It occurs as a white or almost white, crystalline powder or colorless crystals |
| Identification
Test(A) Test(B)
Test(C) |
(a)It complies with the test for pH-3.5 to 5.0 (b)Specified test. The solution is colorless and gives reaction of sulfates (c) It gives positive reaction of sodium |
| Solubility | Freely soluble in water, slightly soluble in ethanol (96%) |
| Appearance of Solution | The solution is clear and colorless |
| pH | Between 3.5 to 5.0 |
| Thiosulfates | Specified Test. The solution remains clear for not less than 15 min |
| Arsenic | Not more than 5 ppm |
| Iron | Not more than 20 ppm |
| Heavy metals | Not more than 20 ppm |
| Assay | Not less than 95.0% and not more than the equivalent of 100.5% of Na2S2O5 |
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
Other
GLP, cGMP (FDA) Approved, ISO 9001, ISO 14001, ISO 45001, ISO 17025, ISO 22000, FSSC 22000, FSSAI, Halal and Kosher certified.
We observe WHO Good manufacturing practice and Good laboratory practice.
