WP Low Level Perchlorate Back Catalog number: 55199 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0345.19-K-IO 4-n-Heptylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 59662-32-7 Price on request 79036 Naphthalene, 1000µg/ml in Acetonitrile, 1ml Price on request 30072 EPA Method 515.1 / 8151A - Analytes Price on request