Iowa BTEX Back Catalog number: 51181 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11707.12-100-IO 3,3',5,5'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 93886 8260B Purgeable Internal Standard Price on request LA15200300AL Metribuzin DA, 10μg/ml in Acetonitrile, 10ml Price on request