2-Butanone (Methyl ethyl ketone)-DNPH Back Catalog number: 83542 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 21113 EPA Method 8260 - Purgeable Internal Standard Price on request 92535 2-Chloronaphthalene Price on request CLM-7531-1.2 Endosulfan sulfate (13C9), 100µg/mL in Nonane, 1,2 Price on request