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 680418 L-Methionine, 100mg Price on request L20795000AL Fluoranthene, 10µg/ml in Acetonitrile, 10ml Price on request 10557.16-1G Indigo dye Price on request