EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11663.12-100-IO 2,2'-Dichlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 680136 1,2,3,5-Tetrachlorobenzene, 100 µg/ml, Methanol, Price on request 2487.8-1G Mono-n-octyltin trichloride, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 3091-25-6 Price on request