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 50809 ICP Mix #1 Price on request 1525.20-100-T Benzo[e]pyrene-d12, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 205440-82-0 Price on request 678948 Fipronil-desulfinyl, 100 µg/ml, Acetonitrile, 1m Price on request