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 B276580-10MG Benzyl Fentanyl, 10mg Price on request 1670.14-K-IO 1,2-Dichlorotetradecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 701920-83-4 Price on request 30129 EPA Method 525 - Perchlorinates & Phthalates Price on request