1848 C. H. Meeker tr. ‘J. H. Rausse’ 64 A poison, combined with a non-poisonous body or substance..can be..freed from the combination only by a chemical transformation of the substance with which it is combined.
1935 Nov. 316/1 White non-poisonous pigments.
2000 18 Oct. i. 13/8 The intruder was, in fact, a non-poisonous corn snake.