101340 Congo red (C.I. 22120)

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Key Specifications Table

CAS #EC NumberHill FormulaMolar MassGrade Value
573-58-0 209-358-4 C₃₂H₂₂N₆Na₂O₆S₂ 696.68 g/mol Reag. Ph Eur

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      Glass bottle 25 g
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      Catalogue Number101340
      Product Information
      CAS number573-58-0
      EC index number611-027-00-8
      EC number209-358-4
      GradeReag. Ph Eur
      Hill FormulaC₃₂H₂₂N₆Na₂O₆S₂
      Molar Mass696.68 g/mol
      HS Code3204 14 00
      Structure formula ImageStructure formula Image
      Quality LevelMQ200
      Biological Information
      Physicochemical Information
      Melting Point>360 °C
      pH value6.7 (10 g/l, H₂O, 20 °C)
      Vapor pressure<1 Pa
      Bulk density600 - 700 kg/m3
      Solubility25 g/l
      Materials Information
      Toxicological Information
      LD 50 oralLD50 Rat 143 mg/kg
      Safety Information according to GHS
      Hazard Pictogram(s) Hazard Pictogram(s)
      Hazard Statement(s)H350: May cause cancer.
      H361d: Suspected of damaging the unborn child.
      Precautionary Statement(s)P201: Obtain special instructions before use.
      P308 + P313: IF exposed or concerned: Get medical advice/ attention.
      Signal WordDanger
      Storage class6.1C Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
      WGKWGK 3 highly hazardous to water
      Safety Information
      Hazard Symbols Hazard SymbolsToxic
      Categories of dangercarcinogenic, toxic for reproduction
      R PhraseR 45-63
      May cause cancer.Possible risk of harm to the unborn child.
      S PhraseS 53-45
      Avoid exposure - obtain special instructions before use.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +5°C to +30°C.
      Packaging Information
      Transport Information
      Declaration (railroad and road) ADR, RIDKein Gefahrgut
      Declaration (transport by air) IATA-DGRNo Dangerous Good
      Declaration (transport by sea) IMDG-CodeNo Dangerous Good
      Supplemental Information
      Identity (UV/VIS-Spectrum)passes test
      Appearance of solution (1 g/l; water)passes test
      Transition rangepH 3.0 - pH 5.2 violet - orange-red
      Absorption maximum λ 1 max. (buffer pH 3.0)563 - 568 nm
      Absorption maximum λ 2 max. (buffer pH 5.2)484 - 489 nm
      Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.01 g/l; buffer pH 3.0; calc. on dried substances)≥ 150
      Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.01 g/l; buffer pH 5.2; calc. on dried substances)≥ 200
      Loss on drying (110 °C)≤ 5 %
      Sensitivity testpasses test