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 96631 Cocaine Mix Price on request H-184S Picene, 50 µg/mL in Toluene, 1ml Price on request 2471.6-K-IP 2,3,6-Tribromophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 28165-57-3 Price on request