EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS 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 30042 EPA Method 531.1 - Analytes Price on request 675327 CPMF, 25mg Price on request