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 681151 Sildenafil citrate, 100mg Price on request 675498 Hexachlorobenzene, 100 µg/ml, Methanol, 5ml Price on request 91816 Surrogate Standard Price on request