EPA Method 8121 Internal Standard

2-Chloro-1,3-propanediol, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 497-04-1

D2-Metronidazole-hydroxy, 10mg

D3-Chloridazon-methyl-desphenyl, 10.0 µg/ml, Acet