The research group of Prof. Alawi and Prof. Sa’adeh developed single chlorinated Terphenyls for further research in addition to the technical grade mixtures, which were produced on an industrial scale such as Aroclor 2565 (a mix of PCB and polychlorinated terphenyl) and Aroclor 5432, 5442 and 5460 (mixes of polychlorinated terphenyls). Please note that all reference materials are shipped with a Gravimetric Certificate. All producing laboratories are accredited to ISO 17034.