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 59909 Cations Std. Level 4 Price on request 59048 Trace Metals Price on request 10614.2-100-ME O,O-Dimethylhydrogenphosphate-13C2 , sodium salt Price on request