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Determination of physicochemical properties of tetrabromobisphenol A
Author(s) -
Kuramochi Hidetoshi,
Kawamoto Katsuya,
Miyazaki Kohei,
Nagahama Kunio,
Maeda Kouji,
Li XianWei,
Shibata Etsuro,
Nakamura Takashi,
Sakai ShinIchi
Publication year - 2008
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/07-472.1
Subject(s) - chemistry , vapor pressure , partition coefficient , dilution , enthalpy , vaporization , aqueous solution , activity coefficient , solubility , boiling point , melting point , chromatography , tetrabromobisphenol a , enthalpy of vaporization , dissociation (chemistry) , analytical chemistry (journal) , thermodynamics , organic chemistry , physics , fire retardant
Aqueous solubility ( S w ), 1‐octanol/water partition coefficient ( K OW ), 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, S w increased by five orders of magnitude, while K OW 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.