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 0018.16-200-T Benzo[b]naphtho[2,3-d]furan, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 243-42-5 Price on request 1943.6-10ML 1,1,1,3,3,3-Hexamethyldisilazane, neat, Solvent-neat, Unit 10mL, # of units-1, Cas.no. 999-97-3 Price on request 678213 Benzobicyclon, 100 µg/ml, Acetonitrile, 1ml Price on request