2,4'-DDD, 100 µg/ml, Acetonitrile, 5ml Back Catalog number: 678377 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 82509 EPA Method 8250/8250A System Performance Check Price on request 83585 4-Nitrophenol Price on request 681998 Glycidyl Stearate, 100 µg/ml, Toluene, 1ml Price on request