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Thymolphthalexon (CAS 62698-55-9)

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Alternate Names:
3′,3″-Bis[N,N-di(carboxymethyl)aminomethyl]thymolphthalein
CAS Number:
62698-55-9
Molecular Weight:
808.69
Molecular Formula:
C38H40N2Na4O12
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Thymolphthalexon is a chemical indicator used in analytical chemistry for titrations and pH measurements. Its role in research is primarily associated with the determination of the endpoint in acid-base titrations, where it changes color in response to pH alterations in the solution. In addition to its use in titrations, Thymolphthalexon is involved in studies to understand the kinetics of chemical reactions where pH is a critical factor. The compound is also useful in the development of sensor technology, as researchers utilize its color-changing properties to design and improve optical sensors for measuring pH in various environments. The stability and distinct color change of Thymolphthalexon under different pH conditions make it useful for quantitative analysis in both educational settings and research laboratories.


Thymolphthalexon (CAS 62698-55-9) References

  1. Simultaneous determination of copper, bismuth and lead by adsorptive stripping voltammetry in the presence of thymolphthalexone.  |  Babaei, A., et al. 2006. Anal Sci. 22: 955-9. PMID: 16837745
  2. Contributions to the basic problems of complexometry-XXVI determination of calcium in the presence of large amounts of magnesium.  |  Pribil, R. and Adam, J. 1977. Talanta. 24: 177-9. PMID: 18962059
  3. Contributions to the basic problems of complexometry-XXVIII New method for successive determination of calcium and magnesium.  |  Pribil, R. and Adam, J. 1979. Talanta. 26: 154-6. PMID: 18962401
  4. Dissociation constants of thymolphthalexone.  |  Hulanicki, A. and Głab, S. 1979. Talanta. 26: 423-4. PMID: 18962462
  5. Polargraphic adsorptive waves of alkaline-earth metal complexes with thymolphthalexone.  |  Qing, Z. and Yuying, H. 1987. Talanta. 34: 555-9. PMID: 18964358
  6. Calcium transients and calcium release in rat fast-twitch skeletal muscle fibres.  |  Garcia, J. and Schneider, MF. 1993. J Physiol. 463: 709-28. PMID: 8246202
  7. Stepwise chelatometric titration of calcium and magnesium with visual endpoint detection in presence of larger amounts of iron(III)  |  Alfred Kosak & Herbert Ballczo. 1971. Fresenius' Zeitschrift für analytische Chemie. 253: 262–266.
  8. Peroxide route to synthesize strontium titanate powders of different composition.  |  Pfaff, G. 1992. Journal of the European Ceramic Society. 9(2): 121-125.
  9. Electrochemical Behavior of Mordant Red 19 and its Complexes with Light Lanthanides  |  Sang, K. L., Taek, D. C., Ki-Hyung, C., Young, G. H., & Ki-Won, C. 1993. Bulletin of the Korean Chemical Society. 14(5): 567-574.
  10. Synthesis of calcium titanate powders by the sol-gel process  |  G Pfaff. 1994. Chem. Mater. 6, 1: 58–62.
  11. Chemical synthesis of calcium stannates from peroxo precursors  |  Pfaff, G. 1995. Materials Science and Engineering: B. 33(2-3): 156-161.
  12. The study of lead sulfide films The behaviour at low-temperature thermal treatment  |  Pop, I., Ionescu, V., Naşcu, C., Vomir, V., Grecu, R., & Indrea, E. 1996. Thin Solid Films. 283(1-2): 119-123.
  13. Elektrochemische Studien an Sulfonphthaleinen, 4. Mitt.[1]. SelbstassemblierteBrompyrogallolrot Monoschichten an einer Quecksilberelektrode.  |  El-Sagher, H. M. 1999. Monatshefte für Chemie/Chemical Monthly. 130: 295-303.

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Thymolphthalexon, 1 g

sc-237106
1 g
$138.00

Thymolphthalexon, 2 g

sc-237106B
2 g
$185.00

Thymolphthalexon, 5 g

sc-237106A
5 g
$362.00

Thymolphthalexon, 10 g

sc-237106C
10 g
$576.00

Thymolphthalexon, 25 g

sc-237106D
25 g
$1127.00