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 688846 alpha-Cypermethrin, 100µg/ml in Acetonitrile, 5ml Price on request 20149 Calibration Mix #1, 200µg/ml in MeOH, 1ml Price on request 79368 Hexachlorocyclopentadiene Price on request