Tuning Solution High Concentration Back Catalog number: 50248 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 66177 2,2',3,3',4',5,6-Heptachlorobiphenyl (177) Price on request 679880 Benzidine, 100 µg/ml, Acetonitrile, 1ml Price on request 683691 Atrazine-desisopropyl-2-hydroxy, 100 µg/ml, Metha Price on request