EPA Method 551Mix “A” Back Catalog number: 30194 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MBP-157 2,3,3',4,4',5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane Price on request 94593 Freon Gas Mix Price on request 677231 ADBI (Celestolid), 10.0 µg/ml, Cyclohexane, 1ml Price on request