EPA Method 1664 - Oil & Grease (Sonicate) Back Catalog number: 91958 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3288.21-K-IO Methyl 11-cis-eicosenoate , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2390-09-2 Price on request 91976 Dimethyl endothall Price on request 50256 Sodium Nitrate as (NO3) Price on request