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101340 Congo red (C.I. 22120)


Replacement Information

Key Specifications Table

CAS #EC NumberHill FormulaMolar MassGrade Value
573-58-0209-358-4C₃₂H₂₂N₆Na₂O₆S₂696.68 g/molReag. 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 Code3212 90 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.
      P202: Do not handle until all safety precautions have been read and understood.
      P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection.
      P308 + P313: IF exposed or concerned: Get medical advice/ attention.
      P405: Store locked up.
      P501: Dispose of contents/ container to an approved waste disposal plant.
      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
      Categories of dangercarcinogenic, toxic for reproduction
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +2°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)564 - 572 nm
      Absorption maximum λ 2 max. (buffer pH 5.2)482 - 488 nm
      Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.02 g/l; buffer pH 3.0; calc. on dried substances)≥ 150
      Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.02 g/l; buffer pH 5.2; calc. on dried substances)≥ 200
      Loss on drying (110 °C)≤ 5 %
      Sensitivity testpasses test