EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0220.20-K-T Perylene, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 198-55-0 Price on request C10861310 1,4-Butanediol, 1ml Price on request 70036 Benzyl butyl phthalate Price on request