EPA Method 507 - Performance Check Solution Back Catalog number: 19130 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673512 Chlorpyrifos-methyl, 100 µg/ml, Ethyl acetate, 5 Price on request 681158 Chlorothiazide, 500mg Price on request 3351.22-100-CY beta-Cypermethrin Price on request