EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92160 PAH Standard Price on request 55025 WP Trace Elements Price on request 1052.7-1ML o-Thiocresol, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 137-06-4 Price on request