| post date: | jan 09,2022 |
| expiry date: | jul 08,2022 |
| detailed description: |
cas no. :7681-57-4
quantity: 25metric tons specs:96.5% price:300 usd metric tons payment method: t/t white or light yellow crystalline powder , relative density is 1.4 . soluble in water (when20℃, 54g/100ml water; when 100 ℃ c, 81.7g/100ml water), acidic aqueous solution. soluble in glycerine, slightly soluble in ethanol. the chemical industry for the production of sodium hydrosulfite, vanillin, hydroxylamine hydrochloride. the photographic industry as a developer. the food industry as a bleaching agent, a preservative, a leavening agent, an antioxidant, a color fixative and preservative agent |
| cas registry number: | 7681-57-4 |
| synonyms: | ;sodium pyrosulfite;disodium disulphite;sodium metabisulphite;sodium disulphite;sodium pyrosulphite;sodium disulfite;disodium oxidosulfanesulfonate oxide;sodium metabi;metabisulfite sodium; |
| molecular formula: | na2s2o5 |
| molecular weight: | 190.1065 |
| molecular structure: | 
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| hazard symbols: | |
| risk codes: | r22:; r31:; r41:; |
| safety description: | s26:; s39:; s46:; |
