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 83581 Bentazon Price on request 1132.12-K-IO n-Dodecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 112-40-3 Price on request 674046 Bis(2-propylheptyl) phthalate, 100mg Price on request