EPA Method 8121 Surrogate Standard Back Catalog number: 81204 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79601 Biphenyl Price on request 673508 Chlorothalonil, 100 µg/ml, Ethyl acetate, 5ml Price on request 11753.12-100-IO 2,3,3',4',5,5'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request