EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92771 Chlorophenols Standard Price on request 675868 2,4-Dimethylphenol, 500mg Price on request 680597 Behenic acid, 100 µg/ml, Acetonitrile, 1ml Price on request