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 59339 Perchlorate Level 1 Price on request Y0000787 Caffeine for system suitability, 10mg Price on request 9270.29-K-ME (2R)-?-Tocopherol-d6 (5,7-di(methyl-d3)),1000 µg/mL,MeOH,1mL Price on request