EPA Method 645 Analytes Back Catalog number: 40059 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677972 Chlorpyrifos-methyl, 100 µg/ml, Toluene, 1ml Price on request 73479 3-Hydroxybutyric acid Price on request 71330 Ethylcyclopentane Price on request