Apply EDTA in the form of dihydrate of disodium salt (complexon of III, trilon B, Na2-EDTA) — in the textile, tanning, paper, paint-and-varnish industry, in production of metals, rubber, in color cinematography, for water softening. In analytical chemistry of EDTA allows to define more than 60 elements. In medicine of EDTA use for removal from organism of radioactive and toxic metals, for blood preservation, etc. In toxicology of the EDTA cobalt salt are used as antidote at poisoning with cyanhydric acid or cyanogen chloride. In stomatology it is used at endodontichesky processing of channels of tooth.
Also it is applied in agriculture in the form of fertilizers (so-called elements in the chelate form). The chelate form of nutritious elements, is well acquired by plants, as at root, and sheet top-dressing.