Aroclors 1016, 1221, 1232, 1242, 1254, 1260, 1262 and 1268 are mixtures of PCBs whilst Aroclor 2565 is a mixture of PCB and polychlorinated terphenyl and Aroclors 5432, 5442 and 5460 are mixtures of polychlorinated terphenyl. All producing laboratories are accredited to ISO 17034.