EPA Method 601 Internal Standard Back Catalog number: 19094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71883 4-Methyl-2-heptanone Price on request P703743 Prednisolone-d8 (Major), 1mg Price on request 9265.17-100-AN U{13C17}-Mycophenolic acid, 100µg/mL, Solvent-acetonitrile, Unit 1.2mL, # of units-1, Cas.no. Price on request