2-Butanone (Methyl ethyl ketone)-DNPH Back Catalog number: 83542 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-D40 Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 1662.10-100-IO 1,1,1,3-Tetrachlorodecane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 51755-60-3 Price on request 2270.3-1.5X20 Acetone, neat, Solvent-neat, Unit 1.5mL, # of units-20, Cas.no. 67-64-1 Price on request