Caffeine, 100 µg/ml, Methanol, 1ml Back Catalog number: 677301 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 2177.12-100-IO 3-Fluoro-2,2',4,4'-tetrachlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 876009-94-8 Price on request 2750.11-1ML n-Valerophenone, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 1009-14-9 Price on request 673753 Butralin, 100 µg/ml, Ethyl acetate, 5ml Price on request