EPA Method 551.1 Performance Check Soln Back Catalog number: 30114 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673685 Pyrazophos, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 674475 Pentachlorothioanisole, 100mg Price on request 8908.14-100-T 3-Methyl-2,2',4,4'-tetrachlorodiphenylmethane Price on request