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 79182 Endosulfan II Price on request 71603 Bromoethane-d5, 1000µg/ml in MeOH, 1ml Price on request 675217 Naproanilide, 10mg Price on request