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 30395 EPA Method 551 “Mix B” Price on request 1024.18-200-TX5 Chrysene-d12, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 1719-03-5 Price on request 674544 Diphenamid, 250mg Price on request