Determination of physicochemical properties of tetrabromobisphenol A

Hidetoshi Kuramochi, Katsuya Kawamoto, Kohei Miyasaki, Kunio Nagahama, Kouji Maeda, Xian Wei Li, Etsuro Shibata, Takashi Nakamura, Shin Ichi Sakai

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


Aqueous solubility (Sw), 1-octanol/water partition coefficient (Kow), and vapor pressure of the nonionic form of 2,2′,6,6′-tetrabromo-4,4′-isopropylidenediphenol (tetrabromobisphenol A or TBBP-A) were measured. From this, enthalpies of solution and vaporization were estimated. Furthermore, enthalpy of fusion and melting point were measured to estimate subcooled liquid vapor pressure, the infinite dilution activity coefficient, and Henry's law constant. Since TBBP-A is expected to exit in both ionic and nonionic forms at near neutral pH, pH effects on physicochemical properties were also examined. Because of the ionization of TBBP-A, Sw increased by five orders of magnitude, while Kow decreased by eight orders of magnitude. Furthermore, an analytical model based on mass balance and dissociation of TBBP-A was applied to represent the pH dependence.

Original languageEnglish
Pages (from-to)2413-2418
Number of pages6
JournalEnvironmental Toxicology and Chemistry
Issue number12
Publication statusPublished - 2008 Dec


  • 1-Octanol-water partition coefficient
  • Aqueous solubility
  • pH effect
  • Vapor pressure


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