Chlorthiophos

Metoprolol-d7 hydrochloride (isopropyl-d7), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1219798-61-4

EPA Method 525 - Fortification Solution

4-Chloro-2-methylphenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 1570-64-5