13C3-Caffeine, 100 µg/ml, Methanol, 1ml

N-Nitrososarcosine

N-Nitrosodi-n-butylamine-d18, 1000µg/ml in MeOH, 1ml

1,2-Dibromo-4-(1,2-dibromoethyl)cyclohexane, 100µg/ml in Toluene, 1ml