Naproxen, 100 µg/ml, Methanol, 1ml Back Catalog number: 680986 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 91515 8260 Surrogates / Internals Standard Price on request 3438.10-100 Metamitron, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 41394-05-2 Price on request 58028 Nickel (Ni) Price on request