EPA 1620 Standard 4 Back Catalog number: 53142 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8649.12-50-T 1,2,3,4,7,8-Hexachlorodibenz-p-dioxin, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request 682336 1,5-Pentanediol, 1000mg Price on request C16986102 Sudan 2, certified, 0.25g Price on request