EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MDD-1378 1,3,7,8-Tetrachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene Price on request CFN98767-10MG Reticuline, >98%, 10mg Price on request 92512 PAH Standard Price on request