Heptachlor, 1.2mL x 100ug/mL, nonane

Diflufenican, 100µg/ml in Acetonitrile, 5ml

4-Chlorobenzyl mercaptan, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 6258-66-8

EPA Method 552.1 - Surrogate Standard