EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70944 1,2,3-Trimethylbenzene Price on request 91397 EPA Method 8141 / 1618 Pesticide Mix A Price on request 1299.5-10ML n-Pentane, neat, Solvent-neat, Unit 10mL, # of units-1, Cas.no. 109-66-0 Price on request