Custom Metals Mix Back Catalog number: 50753 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 14641.9-K-ME 4-Hydroxyamphetamine HCl, 1000µg/ml in MeOH, 1ml Price on request 95590 Petroleum Marker Standard Conc Price on request 673089 Naproxen, 250mg Price on request