Naproxen, 100 µg/ml, Methanol, 1ml Back Catalog number: 680986 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 13700-0023-1000MT Bromoacetic acid, 1000µg/ml in MTBE, 5ml Price on request 57219 Potassium (K) Price on request 70414 2-Naphthylamine Price on request