EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673576 Etofenprox, 100 µg/ml, Ethyl acetate, 5ml Price on request 685621 Fipronil, 100mg Price on request 95207 Fluoranthene Price on request