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105228 m-Cresol purple

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Key Specifications Table

CAS #EC NumberHill FormulaMolar Mass
2303-01-7218-960-6C₂₁H₁₈O₅S382.43 g/mol

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      Glass bottle 5 g
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      Catalogue Number105228
      Synonymsm-Cresolsulfonphthalein, 2',2''-Dimethylphenolsulfonphthalein, MCP
      Product Information
      CAS number2303-01-7
      EC number218-960-6
      Hill FormulaC₂₁H₁₈O₅S
      Molar Mass382.43 g/mol
      HS Code2934 99 90
      Structure formula ImageStructure formula Image
      Quality LevelMQ200
      Biological Information
      Physicochemical Information
      Bulk density480 kg/m3
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Storage class10 - 13 Other liquids and solids
      WGKWGK 3 highly hazardous to water
      Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
      Safety Information
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +2°C to +30°C.
      Packaging Information
      Transport Information
      Supplemental Information
      Identity (UV/VIS-Spectrum)passes test
      Appearance of solution (1 g/l; water)passes test
      1st transition rangepH 1.2 - pH 2.8 pink - yellow
      2nd transition rangepH 7.4 - pH 9.0 brownish yellow - violet
      Absorption maximum λ 1 max. (buffer pH 1,2)526 - 529 nm
      Absorption maximum λ 2 max. (buffer pH 2,8)431 - 437 nm
      Absorption maximum λ 3 max. (buffer pH 7,4)431 - 437 nm
      Absorption maximum λ 4 max. (buffer pH 9,0)576 - 580 nm
      Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.01 g/l; buffer pH 1,2; calc. on dried substances)750 - 880
      Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.01 g/l; buffer pH 2,8; calc. on dried substances)400 - 470
      Spec. Absorptivity A 1%/1cm (λ 3 max.; 0.01 g/l; buffer pH 7,4; calc. on dried substances)380 - 440
      Spec. Absorptivity A 1%/1cm (λ 4 max.; 0.01 g/l; buffer pH 9,0; calc. on dried substances)700 - 830
      Loss on drying (110 °C)≤ 1 %