Date published: 2025-12-8

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Phenolphthalein (CAS 77-09-8)

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Alternate Names:
3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
Application:
Phenolphthalein is a commonly used colorimetric pH indicator
CAS Number:
77-09-8
Molecular Weight:
318.32
Molecular Formula:
C20H14O4
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Phenolphthalein is a chemical that is commonly used as a colorimetric pH indicator. The compound has been observed to turn orange at pH


Phenolphthalein (CAS 77-09-8) References

  1. Induction of chromosome aberrations in vitro by phenolphthalein: mechanistic studies.  |  Armstrong, MJ., et al. 2000. Mutat Res. 457: 15-30. PMID: 11106795
  2. Estrogenic effects of phenolphthalein on human breast cancer cells in vitro.  |  Ravdin, PM., et al. 1987. Breast Cancer Res Treat. 9: 151-4. PMID: 3620717
  3. Therapeutic effects of Bombax ceiba flower aqueous extracts against loperamide-induced constipation in mice.  |  Wang, L., et al. 2023. Pharm Biol. 61: 125-134. PMID: 36582187
  4. Comparison of detection methods for carbonation depth of concrete.  |  Li, B., et al. 2023. Sci Rep. 13: 19980. PMID: 37968286
  5. Durability of Concrete with Superabsorbent Polymer (SAP) Assessed Using Depth of Carbonation and NDT Ultrasonic Methods.  |  Sokołowska, JJ. 2024. Materials (Basel). 17: PMID: 38399157
  6. Effectiveness of Thymol Blue and Phenolphthalein in Sol-Gel Coatings for Sensing and Inhibiting Corrosion on Mild Steel.  |  Patra, R., et al. 2024. Langmuir. 40: 6035-6050. PMID: 38439129
  7. Visual authenticating hazardous adulterant phenolphthalein in slimming foods: Target-mimicking hapten epitope improved immunoassay.  |  Liu, Z., et al. 2024. Food Chem. 446: 138912. PMID: 38452509
  8. Highly Permeable Ultrafiltration Membranes Based on Polyphenylene Sulfone with Cardo Fragments.  |  Raeva, A., et al. 2024. Polymers (Basel). 16: PMID: 38475386
  9. Hypoglycemic effects of mountain caviar extract and inhibitory mechanism of saponins, including momordin Ic, on glucose absorption.  |  Miyasaka, K., et al. 2024. J Nat Med. 78: 693-701. PMID: 38587581
  10. Nanogels Based on N,N-Dimethylacrylamide and β-Cyclodextrin Triacrylate for Enhanced Solubility and Therapeutic Efficacy of Aripiprazole.  |  Stoilova, S., et al. 2024. Gels. 10: PMID: 38667636
  11. Carbonation Resistance of Ternary Portland Cements Made with Silica Fume and Limestone.  |  Sanjuán, MÁ., et al. 2024. Materials (Basel). 17: PMID: 38893968
  12. Cell-transforming activity and genotoxicity of phenolphthalein in cultured Syrian hamster embryo cells.  |  Tsutsui, T., et al. 1997. Int J Cancer. 73: 697-701. PMID: 9398048

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Phenolphthalein, 100 g

sc-206050
100 g
$39.00

Phenolphthalein, 500 g

sc-206050A
500 g
$134.00