Internal Standard Back Catalog number: 90396 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675246 Picolinafen, 100 µg/ml, Acetonitrile, 5ml Price on request 94319 2-Propanol Price on request 675777 Norflurazon, 100 µg/ml, Ethyl acetate, 5ml Price on request