Nitrite (NO2-) as N

Chlorpyrifos-methyl, 100µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 5598-13-0

Endosulfan (techn.), 10µg/ml in Cyclohexane, 10ml

Coumaphos, 100 µg/ml, Acetonitrile, 1ml