1,2,3,4-Tetramethylbenzene Back Catalog number: 32901 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72809 Perfluoroheptanoic acid Price on request S-4072-05-10ME Sulfur Standard 1 Unit: 10mL screw cap bottle Chiron No. Matrix: Methanol Compound Concentration S-4072 Diethyl sulfide 0.5 ppm (w/w) Di-n-butyl sulfide 0.5 ppm (w/w) Price on request 1927.12-50-IO 4'-Fluoro-2,3',6-tribromodiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 863314-86-7 Price on request