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    o-Cresolphthalein

    Available from stock

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      o-Cresolphthalein

      SKU
      C0242

      Category: Non Fluorescent Detection & Chromogene Detection

      Synonyms
      Ortho-Cresolphthalein , Cresolphthalein , 3',3''-Dimethylphenolphthalein , BRN 0310554 , 3,3-Bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1(3H)-one
      596-27-0
      CAS-Number
      C22H18O4
      Molecular Formula
      346.38
      Molecular Weight

      For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

      • Product Data
      • Handling
      • Safety Information
      • Details

      Specifications

      Purity
      ≥95% (NMR)
      Appearance
      White to light yellow powder
      Identity
      1H-NMR

      Properties

      Solvents
      ethanol, water (insoluble)
      Melting Point
      219-221 °C(lit.)

      Documentation

      Safety Data Sheet (SDS)
      CDX C0242 MSDS.pdf
      Shipping
      AMBIENT
      Short Term Storage
      RT
      Long Term Storage
      +4°C
      Handling Advice
      Protect from light and moisture.
      Use / Stability
      Stable for at least 2 years after receipt when stored at +4°C.
      Transportation
      Not dangerous goods
      Description
      o-Cresolphthalein is a reversible pH indicator that is colorless at pH 8.2 and red at pH 9.8. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm. Spectral data: UV-Visible (λmax) 566 nm, 381 nm (2nd). This compound is applied in sensors, display device, imaging materials, authentication system for secure documents, lithium cells, inks, markers, toners, paints, adhesives, food storage, urine analysis test strips, drugs and blood analysis.
      Smiles
      O=C1C2=CC=CC=C2C(C3=CC=C(O)C(C)=C3)(C4=CC(C)=C(O)C=C4)O1
      InChi Key
      CPBJMKMKNCRKQB-UHFFFAOYSA-N
      References
      (1) L.G. Morin, Am. J. Clin. Pathol. 61, 114 (1974) , (2) W. Moorehead, Clin. Chem. 20, 1458 (1974) , (3) K. Hosoi, et al., J. Biochem. 78, 1331 (1975) , (4) R.W. Sabnis, Handbook of Acid-Base Indicators (2008)

      o-Cresolphthalein is a reversible pH indicator that is colorless at pH 8.2 and red at pH 9.8. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm. Spectral data: UV-Visible (λmax) 566 nm, 381 nm (2nd). This compound is applied in sensors, display device, imaging materials, authentication system for secure documents, lithium cells, inks, markers, toners, paints, adhesives, food storage, urine analysis test strips, drugs and blood analysis.

      SKU: C0242 Category: Non Fluorescent Detection & Chromogene Detection
      • Additional information

      Additional information

      Synonyms

      Ortho-Cresolphthalein, Cresolphthalein, 3',3''-Dimethylphenolphthalein, BRN 0310554, 3,3-Bis(4-hydroxy-3-methylphenyl)-2-benzofuran-1(3H)-one

      Purity

      ≥95% (NMR)

      Appearance

      White to light yellow powder

      CAS-Number

      596-27-0

      Molecular Formula

      C22H18O4

      Molecular Weight

      346.38

      Identity

      1H-NMR

      Solvents

      ethanol, water (insoluble)

      Melting Point

      219-221 °C(lit.)

      Smiles

      O=C1C2=CC=CC=C2C(C3=CC=C(O)C(C)=C3)(C4=CC(C)=C(O)C=C4)O1

      InChi Key

      CPBJMKMKNCRKQB-UHFFFAOYSA-N

      Shipping

      AMBIENT

      Short Term Storage

      RT

      Long Term Storage

      +4°C

      Handling Advice

      Protect from light and moisture.

      Use / Stability

      Stable for at least 2 years after receipt when stored at +4°C.

      Transportation

      Not dangerous goods

      References

      (1) L.G. Morin, Am. J. Clin. Pathol. 61, 114 (1974), (2) W. Moorehead, Clin. Chem. 20, 1458 (1974), (3) K. Hosoi, et al., J. Biochem. 78, 1331 (1975), (4) R.W. Sabnis, Handbook of Acid-Base Indicators (2008)

      Quantity

      10 g, Bulk

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