Heptachlor endo-epoxide, 10.0 µg/ml, Cyclohexane,

C21 Ring-C Monoaromatic sterane (5ß(H),10ß(CH3)/5 alpha(H),10ß(CH3)), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 98774-61-9 / 98774-59-5

EPA Method 508 Surrogate Standard

4,4'-DDD D8, 10mg