Napropamide, 100 µg/ml, Acetonitrile, 5ml Back Catalog number: 678444 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 673536 2,4'-DDT, 100 µg/ml, Ethyl acetate, 5ml Price on request 681198 2-(2-Chlorobenzylidene)malononitrile, 100mg Price on request 19267 EPA Method 502/524 Surrogate Standard #2 Price on request