Prepd from hydrobromic acid and n-octanol: O. Kamm, C. S. Marvel, Org. Synth. coll. vol. I, 30 (2nd ed., 1941); cf. Norris et al., J. Am. Chem. Soc. 38, 1076 (1916); Whitmore et al., ibid. 67, 2059 (1945); from PBr3 and n-octanol: Coulson et al., J. Chem. Soc. 1965, 2364. Toxicity study: H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969).