Effects of Water Temperature, Hardness, and PH on the Toxicity of Benzocaine to Eleven Freshwater Fishes
Auteur : Terry D. Bills, U.S. Fish and Wildlife Service, George E. Howe, Leif L. Marking
Date de publication : 1990
Éditeur : U.S. Fish and Wildlife Service, National Fisheries Research Center--La Crosse
Nombre de pages : 6
Résumé du livre
The toxicity of benzocaine (ethyl 4-aminobenzoate; 98%) to eleven freshwater fishes was evaluated under various physical and chemical conditions. Tests conducted at three water temperatures, four hardnesses, and three pH's showed that none of these variables influenced toxicity. The higher temperatures tested did not increase the rate of toxicosis. Users of benzocaine should be cautioned that overdoses may lead to undue stress or mortality in exposed fish. Comparison benzocaine concentrations by high performance liquid chromatography at 0 and 96 hours showed no degradation of the compound during the exposure period.