106505 Sodium dithionite

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Key Specifications Table

CAS #EC NumberHill FormulaChemical FormulaMolar Mass
7775-14-6 231-890-0 Na₂O₄S₂ Na₂S₂O₄ 174.11 g/mol

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      Steel drum 50 kg
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      Catalogue Number106505
      SynonymsSodium hydrosulfite, Sodium hypodisulfite
      Product Information
      CAS number7775-14-6
      EC index number016-028-00-1
      EC number231-890-0
      Hill FormulaNa₂O₄S₂
      Chemical formulaNa₂S₂O₄
      Molar Mass174.11 g/mol
      HS Code2831 10 00
      Quality LevelMQ200
      Biological Information
      Physicochemical Information
      Density2.5 g/cm3 (20 °C)
      Flash point>100 °C
      Ignition temperature>200 °C
      Melting Point100 °C (decomposition)
      pH value5.5 - 8.5 (50 g/l, H₂O, 20 °C)
      Bulk density1250 kg/m3
      Solubility250 g/l (slow decomposition)
      Materials Information
      Toxicological Information
      LD 50 oralLD50 Rat 2500 mg/kg
      Safety Information according to GHS
      Hazard Pictogram(s) Hazard Pictogram(s)
      Hazard Statement(s)H251: Self-heating: may catch fire.
      EUH031: Contact with acids liberates toxic gas.
      Signal WordDanger
      Storage class4.2 Pyrophoric and self-heating hazardous materials
      WGKWGK 1 slightly hazardous to water
      Sulfides and sulfites as well as other reducing substances, inorganic cyanides and isonitriles: Stir into sodium hypochlorite solution (Cat. No. 105614) and, if necessary, leave to react for several days. Caution: some substances may show a violent reaction! Draw off any toxic or flammable gases that may be formed. Excess oxidant should be neutralized with sodium thiosulfate (Cat. No. 106513). Container D or E.
      Safety Information
      Hazard Symbols Hazard SymbolsHarmful
      Hazard SymbolsOxidising
      Categories of dangeroxidizing, harmful
      R PhraseR 7-22-31
      May cause fire.Harmful if swallowed.Contact with acids liberates toxic gas.
      S PhraseS 3/7-14
      Keep container tightly closed in a cool place.Keep away from .?.
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +5°C to +30°C.
      Packaging Information
      Transport Information
      Declaration (railroad and road) ADR, RIDUN 1384 , 4.2, II
      Declaration (transport by air) IATA-DGRUN 1384 , 4.2, II
      Declaration (transport by sea) IMDG-CodeUN 1384 , 4.2, II
      Supplemental Information
      Assay (iodometric)≥ 85.0 %
      Identitypasses test
      Chloride (Cl)≤ 0.05 %
      Fe (Iron)≤ 0.005 %