EPA Method 8270C Pesticide Mix #25 Back Catalog number: 82723 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79142 Hexachlorocyclopentadiene Price on request 9305. Dextropropoxyphene, , Solvent-, Unit , # of units-, Cas.no. Price on request 72899 Methyl isobutyrate Price on request