EPA Method 8240A Calibration Check Compounds

2-(4-Chlorophenyl)-1H-benzimidazole, neat, Solvent-neat, Unit 10MG, # of units-15, Cas.no. 1019-85-8

Serotonin-13C2, 15N

Cadusafos, 100 µg/ml, Toluene, 1ml