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 50152 Ammonia as N Price on request 8388-100MG Triton X-100 (n=4-17), neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 9002-93-1 Price on request 63112B PCB 112, 1000µg/ml in Isooctane, 10ml Price on request