1,2,3,4-Tetramethylbenzene Back Catalog number: 70491 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70987 Isopropyl ether Price on request A50000753MW EPA Method 1633 PFAS Mix, 10µg/mL in MeOH:Water, 1ml Price on request 96868 Heptachlor Price on request