4,4'-DDE, 100 µg/ml, Ethyl acetate, 5ml Back Catalog number: 673534 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 678089 EPN, 100 µg/ml, Acetonitrile, 1ml Price on request 81203 EPA Method 8121 Internal Standard Price on request 91625 Surrogate Standard Price on request