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 93821 EPA Method 505 Analytes Price on request 676532 Fenvalerate, 250mg Price on request 3293.22-K-IO Methyl 12-cis-heneicosenoate , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 146407-38-7 Price on request