{ "$schema": "https://foodadditiveindex.com/api/v1/schema.json", "id": "https://foodadditiveindex.com/additives/sodium-thiosulfate", "slug": "sodium-thiosulfate", "name": "Sodium thiosulfate", "identifiers": { "e_number": null, "ins_number": "539", "cas_number": "7772-98-7", "inchikey": "AKHNMLFCWUSKQB-UHFFFAOYSA-L", "pubchem_cid": 24477 }, "functional_class": "Preservative", "summary": "Sodium thiosulfate is an antioxidant and sequestrant, and is used to remove residual chlorine and iodine from processing water.", "derivation_summary": "Produced by reacting sodium sulfite with sulfur. 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