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 59171 Calibration Standard Price on request 32601 1,2,3-Trimethylbenzene Price on request C244102 Ceftazidime-d5 (90%), 1mg Price on request