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 3756.20-K-IO Alverine (free base), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 150-59-4 Price on request 3008.10-K-IO 3,6-Dimethyloctane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 15869-94-0 Price on request 1349.20-10MG Benzo[k]fluoranthene-d12, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 93952-01-3 Price on request