13C3-Caffeine, 100 µg/ml, Methanol, 1ml Back Catalog number: 681491 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 71264 N-Nitrososarcosine Price on request 9015.8-K-ME N-Nitrosodi-n-butylamine-d18, 1000µg/ml in MeOH, 1ml Price on request FRS-038S 1,2-Dibromo-4-(1,2-dibromoethyl)cyclohexane, 100µg/ml in Toluene, 1ml Price on request