Wellington Laboratories Inc. offers a variety of native and mass-labelled reference standards for legacy environmental contaminants such as polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs). We also provide ready-to-use calibration sets that have been designed to meet regulatory requirements for the analysis of PCDDs/PCDFs and PCBs in many countries. Our inventory of emerging environmental contaminants such as Brominated Flame Retardants (BFRs) and Perfluorinated Compounds (PFCs) also continues to expand. Wellington currently offers a number of individual native and mass-labelled reference standards as well as many solution/mixtures to support research in these areas.