Solubilization of NSC-639829

Neera Jain, Gang Yang, S. Esmail Tabibi, Samuel H. Yalkowsky

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Solubilization using pH combined with cosolvents, surfactants, and complexants are investigated for NSC-639829, an investigational anti-tumor agent. The intrinsic solubility of the drug is approximately 30 ng/ml and it has an ionizable dimethyl aniline group with an approximate base pKa of 5. Samples buffered at pH 1.0, 2.0, and 7.0 with various concentrations of the solubilizing agents were used to study the solubilization of NSC-629829 when present as charged and uncharged species. The solubilization of NSC-639829 was found to be much more effective when the drug was present primarily in ionized form. At pH values 1.0 and 2.0 where the surfactant (SLS) and complexant (SBEβCD) carried a negative charge enhanced solubilities of more than a million-fold were observed for the drug.

Original languageEnglish (US)
Pages (from-to)41-47
Number of pages7
JournalInternational Journal of Pharmaceutics
Issue number1-2
StatePublished - Aug 28 2001


  • Dimethyl aniline
  • NSC-639829
  • Solubilization

ASJC Scopus subject areas

  • Pharmaceutical Science


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