4,4'-DDE, 100 µg/ml, Acetonitrile, 5ml Back Catalog number: 678380 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 92387 EPA Method 8141 Surrogate Standard Price on request 68C-IS Labelled Injection/Internal Standard Stock Solution, 1.2ml, nonane Price on request 2691.34-10UG 17ß(H),21 alpha(H)-(22R)-Tetrakishomohopane , neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 79951-54-5 Price on request