EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 51188 Unleaded 89 Octane (ETOH) 50% Weathered Price on request 1445.14-K-IO 4-n-Octylphenol, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1806-26-4 Price on request 675034 Sodium dodecylbenzenesulfonate (hard type) (ABS 10 Price on request