p-Xylene, 1000µg/ml in MeOH, 1ml Back Catalog number: 70308 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678426 Heptachlor, 100 µg/ml, Acetonitrile, 1ml Price on request 673654 Parathion-methyl, 100 µg/ml, Ethyl acetate, 5ml Price on request 50110B TOC Calibration Standard Price on request