"chelating agent"@en . "sequestrant"@en . . "sequestering agent"@en . . . "2012-10-22T15:12:34"^^ . "agent, chelating"@en . "Organic chemical compounds capable of forming coordinate bonds with metals. Chelating agents are used to sequester or remove residual trace metal ions from materials to which they have attached. In a conservation context, uses of chelants include stabilizing of paper containing iron-gall ink, removal of iron residue from platinum prints; treatment of excavated copper objects."@en . "chelants"@en . "2013-01-03T12:22:50"^^ . "300379664" .