EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676152 D5-Fenpropathrin, 100 µg/ml, Ethyl acetate, 1ml Price on request 79145 Aniline Price on request 50738 Nitrite as NO2- Price on request