System Performance Standard, in Heptane, 1x5ml Back Catalog number: ASTM-P-0135 Availability: In the manufacturer's stock Price on request - + Recommended 2008.12-100-IO 2,3,3',4,4'-Pentachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 32598-14-4 Price on request 675721 Heptachlor-exo-epoxide, 10.0 µg/ml, Ethyl acetate Price on request 11753.12-100-IO 2,3,3',4',5,5'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request