translate English to French: The atmospheric half-life, based on hydroxyl radical reaction rate constants, is calculated to be between four and 189 hours (Callahan et al., 1979; Cupitt, 1980; Edney et al., 1982; Howard, 1989; Grosjean, 1990b; Kelly et al., 1994).
La demi-vie du composé dans l'atmosphère, estimée d'après les constantes de réaction du radical hydroxyle, se situe entre 4 et 189 h (Callahan et al., 1979; Cupitt, 1980; Edney et al., 1982; Howard, 1989; Grosjean, 1990b; Kelly et al., 1994).