Tuning Solution Low Concentration Back Catalog number: 50442 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MHPCHLOR (13C10)Heptachlor, 1.2mL x 100ug/mL, nonane Price on request 95367 Formaldehyde Price on request 678377 2,4'-DDD, 100 µg/ml, Acetonitrile, 5ml Price on request