thallium http://inspire.ec.europa.eu/codelist/CommodityCodeValue/thallium Thallium is a chemical element with symbol Tl and atomic number 81. This soft gray other metal is not found free in nature. When isolated, it resembles tin, but discolors when exposed to air. - http://en.wikipedia.org/wiki/Thallium ConceptSchemenullskos/CommodityCommoditynyersanyagnullnullConceptskos/Commodityskos/Commodity/MIN4EUMIN4EU list of commoditiesMIN4EU nyersanyag listanullskos/Commodity