EPA Method 8081A Pesticides QC Mix

Isonicotinaldehyde, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 872-5-5

Isofenphos, 100 µg/ml, Ethyl acetate, 5ml

2,4,4,5-Tetrachlorobiphenyl (BZ-74)