EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8-B-23-CDF 8-Bromo-2,3-dichlorodibenzofuran, 1.2ml x 50ug/ml, toluene Price on request 94507 alpha-Methylstyrene Price on request 0193.4-1ML Diethylsulfide, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 352-93-2 Price on request