Calibration Standard Set Back Catalog number: 53042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678440 Metalaxyl, 100 µg/ml, Acetonitrile, 5ml Price on request 673654 Parathion-methyl, 100 µg/ml, Ethyl acetate, 5ml Price on request DF-147-S 1,4,7-Trichlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request