EPA Method 515.3 - Underivatized acids Back Catalog number: 30150 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11662.10-50-IO 1,8-Dichloronaphthalene,50 µg/mL,isooctane,1mL, Price on request 675558 Dimefuron, 100 µg/ml, Acetonitrile, 5ml Price on request 71478 p-Chlorophenyl methyl sulfone Price on request