Salicylate ion forms transient adducts with H atoms, OH radicals and e-aq, when deaerated solutions are irradiated with a pulse of 1.8 Mev. electrons. The absorption band due to the electron adduct is centered on 4400 A., while the H and OH adducts absorb between 3500 and 4000 A. The rates of formation of the adducts, determined directly and by competitive methods, are k(H + salicylate) = 1.4 X 109, k(OH + salicylate) = 1.2 X 1010 and k(e-aq, + salicylate) ~ 1010 liter mole-1 sec.-1. The electron adduct is rapidly protonated. All three adducts disappear principally by second-order reactions with half-lives which decrease markedly in acid solution compared with their values in neutral solution.