EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0751.12-K-IO 5,7-Dimethyltetraline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 21693-54-9 Price on request 19494 EPA Method 524 & 624 - Internal Standard Price on request 3519.6-100-AN 1,2,4-Trichlorobenzene Price on request