4-Heptanone Back Catalog number: 72538 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11688.12-100-IO 2,2',4,5-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 2874.11-50-ME Perfluoroundecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 2050-94-8 Price on request 2721.16-K-IO 4,4'-Dimethylbibenzyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 538-39-6 Price on request