EPA Method 551.1 Standard Back Catalog number: 94519 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70823 Chloridazon, 1000µg/ml in MeOH, 1ml Price on request L20017000IO PCB No. 170, 10 ng/µl, 10ml Price on request 680467 2-Ethyltoluene, 200 µg/ml, Methanol, 1ml Price on request