Naproxen, 100 µg/ml, Methanol, 1ml Back Catalog number: 680986 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 3867.9-K-ME Coumarin, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 91-64-5 Price on request 53102 IC-MS Verification Standard Price on request 97128 525.2 Perfomance Check Solution Price on request