EPA Method 1664 - Oil & Grease (Sonicate) Back Catalog number: 91958 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679768 2,4,6-Trichlorophenoxyacetic acid, 10 µg/ml, Acet Price on request 8481.22-500MG Diltiazem hydrochloride, neat, Solvent-neat, Unit 500mg, # of units-1, Cas.no. 33286-22-5 Price on request 676970 Nonadecafluorodecanoic acid, 100 µg/ml, Acetonitr Price on request