Heptachlor, 100 µg/ml, Acetonitrile, 1ml Back Catalog number: 678426 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 3754.20-K-IO 4-tert-Octylphenol 3EO, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2315-62-0 Price on request 72547 Phenyl sulfone Price on request EPA-8280MSS Matrix Spiking Solution, 1.2ml, nonane Price on request