PCB No. 31, certified, 25mg Back Catalog number: C20003100 Availability: In the manufacturer's stock Price on request - + Recommended 8648.12-50-T 1,2,4,6,7-Pentachlorodibenzo-p-dioxin, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request 96127 NPD Mix 7 components Price on request 40003 EPA Method 601 - Purgeables Mix #4 Price on request