{"id":10568,"date":"2023-03-08T08:06:21","date_gmt":"2023-03-08T08:06:21","guid":{"rendered":"https:\/\/masterchem.lv\/?post_type=product&p=10568"},"modified":"2023-05-01T10:02:44","modified_gmt":"2023-05-01T10:02:44","slug":"sodium-sulfite-cas-7757-83-7","status":"publish","type":"product","link":"https:\/\/masterchem.lv\/en\/product\/sodium-sulfite-cas-7757-83-7\/","title":{"rendered":"Sodium sulfite (CAS 7757-83-7)"},"content":{"rendered":"

Information<\/strong><\/p>\n

Industries: Food industry
\nCAS number: 7757-83-7
\nWE number: 231-821-4
\nChemical formula: Na2SO3
\nMolar mass: 126,04 g\/mol
\nCustoms tariff code: 28321000<\/p>\n

Physical properties<\/strong>
\npH: 8,8-10,0 (50 g\/l H2O w 20 \u00baC)
\nRelative density: 2,63 g\/cm3 (4\u00baC)
\nSolubility in water: 12,5 g\/l (0\u00baC)<\/p>\n","protected":false},"excerpt":{"rendered":"

Sodium sulfite (CAS 7757-83-7)<\/strong><\/p>\n

Sodium sulfite (sodium sulphite) is the inorganic compound with the chemical formula Na2SO3. A white, water-soluble solid, it is used commercially as an antioxidant and preservative. A heptahydrate is also known but it is less useful because of its greater susceptibility toward oxidation by air.<\/p>\n

Sodium sulfite is primarily used in the pulp and paper industry.<\/p>\n

As an oxygen scavenger agent, it is used to treat water being fed to steam boilers to avoid corrosion problems, in the photographic industry, it protects developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions.<\/p>\n

As a reducing agent it is used in the textile industry as a bleaching, desulfurizing, and dechlorinating agent (e.g. in swimming pools). Its reducing properties are exploited in its use as a preservative to prevent dried fruit from discoloring, and for preserving meats.<\/p>\n

It is used as a reagent in sulfonation and sulfomethylation agent. It is used in the production of sodium thiosulfate.<\/p>\n","protected":false},"featured_media":10585,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_brand":[],"product_cat":[167,78],"product_tag":[],"class_list":{"0":"post-10568","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-all-goods","7":"product_cat-food-industry","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-variable"},"yoast_head":"\nSodium sulfite (CAS 7757-83-7) - \u0136\u012bmija r\u016bpniec\u012bbai — Š\u0137\u012bdin\u0101t\u0101ji un \u0137\u012bmisk\u0101s vielas — Masterchem.ee<\/title>\n<meta name=\"description\" content=\"Sodium sulfite (sodium sulphite) is the inorganic compound with the chemical formula Na2SO3.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/masterchem.lv\/en\/product\/sodium-sulfite-cas-7757-83-7\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sodium sulfite (CAS 7757-83-7) - 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