A South Florida man who sued a group of manufacturing, distributing and retail companies over alleged exposure to a cancer-causing chemical in their products has had his hopes dashed, as the Fourth District Court of Appeal found his lawsuit didn’t meet the state’s causation standards.

Robert O’Donnell and his wife, Sandra, sued in 2013. They alleged he had developed a blood and bone marrow disease after 40 years spent installing carpets and flooring, using adhesive products and removing agents that contained benzene, a known carcinogen.