Benzalkonium chloride, 100µg/ml in AL, 5ml

Trimethoprim, certified, 0.25g

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol

cis-1,2-Dichloroethylene, 100μg/ml in MeOH,2ml