Internal Reference Standard Back Catalog number: 52187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675761 Heptachlor endo-epoxide, 10.0 µg/ml, Ethyl acetat Price on request 52126 Brominated Inorganic Disinfection Price on request 8799.12-5MG 2,2',3,3',4',5,6-Heptachlorobiphenyl, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 52663-70-4 Price on request