EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98727 Acrolein (0.25% w/v) Price on request 677486 2,3,4,6-Tetrachlorophenol, 50mg Price on request 677148 Diphenyltin dichloride, 1000 µg/ml, Methanol, 5m Price on request