Piperonyl butoxide, 100 µg/ml, Ethyl acetate, 5m

Nitrite as NO2-, 1000µg/ml in water, 100ml

Formetanate hydrochloride, 100 µg/ml, Acetonitril

N-Nitrosopiperazine, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 5632-47-3