Aroclor 1221 Back Catalog number: 79403 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1399.12-K-IO Tri-n-butylphosphate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 126-73-8 Price on request C366177-1MG (2-Chloroethyl) Phosphonic Acid-d4, 1mg Price on request 1147.27-K-IO n-Heptacosane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 593-49-7 Price on request