Internal standard 2, 2000g/ml in MeOH, 1ml

N-Nitrosodimethylamine, 1000μg/ml in MeOH, 1ml

Dalapon methyl ester, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 17640-02-7

N-Nitroso-N-butyl-N-propylamine, 50mg