D3-(±)-Naproxen, 100 µg/ml, Methanol, 1ml Back Catalog number: 677719 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 90378 EPA Method 622 / 8141 - Analytes Price on request 71666 2,4-Dinitroanisole, 1000μg/ml in MeOH, 1ml Price on request 73033 Benzoylecgonine Price on request