EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71222 1,2,4,5-Tetramethylbenzene Price on request 677760 Aromatic Comp.-Mix 16, 10.0 µg/ml, Methanol, 1ml Price on request 0139.16-K-IO 3,3',4,4'-Tetramethylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4920-95-0 Price on request