Effect of ethylenediaminetetraacetic acid (EDTA) on acute mercury poisoning of toad.

Studies have been carried out on the ability of EDTA (CaNa2-ethylenediaminetetraacetate) to offset the acute toxicity of mercuric chloride. The lethality of mercury was tested in female Bufo regularis species (Amphibia) which were given EDTA immediately after the Hg2+ injection. The results show that the inherent toxicity of the EDTA-mercury complex is sufficiently high for it to be ineffective as an antidote.