ABSTRACT

Br Br CASRN: 626-39-1; molecular formula: C6H3Br3; FW: 314.80 Physical state: Solid Melting point (°C): 121.81 (van der Linde et al., 2005) Boiling point (°C): 271 at 765 mmHg (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.62 at 20 °C using method of Hayduk and Laudie (1974) Bioconcentration factor, log BCF: 3.97-4.08 (rainbow trout, Oliver and Niimi, 1985) Ionization potential (eV): 8.91-9.21 (Lias et al., 1998) Soil organic carbon/water partition coefficient, log Koc: 4.05 using method of Chiou et al. (1979) Octanol/water partition coefficient, log Kow: 4.62 (average of two values, generator column-HPLC, Garst, 1984) 4.51 at 25 °C (shake flask-GC, Watarai et al., 1982) 5.26 (Gobas et al., 1978) Solubility in organics: Soluble in benzene, chloroform, and ether (Weast, 1986) Solubility in water: 2.51 µmol/L at 25 °C (shake flask-UV spectrophotometry, Yalkowsky et al., 1979) Environmental fate: Photolytic. Peijnenburg et al. (1992) investigated the photodegradation of a variety of substituted aromatic halides using a Rayonet RPR-208 photoreactor equipped with 8 RUL 3,000Ǻ lamps (250-350 nm). The reaction of 1,3,5-tribromobenzene (initial concentration 10-5 M) was conducted in distilled water and maintained at 20 °C. Though no products were identified, the investigators reported photohydrolysis was the dominant transformation process. The measured pseudo-first-order reaction rate constant and corresponding half-life were 0.005/min and 140.5 min., respectively. Chemical/Physical. 1,3,5-Tribromobenzene will not hydrolyze to any reasonable extent.