EPA 8240B Calibration Standard Back Catalog number: 98430 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72058 Biphenyl-d10 Price on request DF-12348-S 1,2,3,4,8-Pentachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request PN-56S 1,2,3,7,8-Pentachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request