Internal Standard ASTM D-5307 Back Catalog number: 51124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 18000-1277-100AN1 Venlafaxine-HCl, 100µg/ml in Acetonitrile, 1,2ml Price on request 9530.19-100-ME Clomipramine hydrochloride Price on request 73424 2,3-Dihydrobenzofuran Price on request