Calibration Verification Solution , 1ml, nonane Back Catalog number: EPA-1613CS3 Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 679379 Demeton-S-methyl-sulfone, 10 µg/ml, Cyclohexane, Price on request 79008 Alachlor Price on request 678492 Propyzamide, 100 µg/ml, Acetonitrile, 5ml Price on request