EPA Method 1664 - Oil & Grease (Sonicate) Back Catalog number: 91958 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2833.6-50-ME 2H,3H-Perfluorohex-2-enoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 37759-76-5 Price on request 9813.2-100-ME Dimethylnitramine,100 µg/mL,MeOH,1mL Price on request 2789.12-100-AN 4,4'-Thiodianiline,100 µg/mL,acetonitrile,1mL, Price on request