Internal Standard for AB SIM Back Catalog number: 94541 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677604 2-Quinoxalinecarboxylic acid, 100mg Price on request DF-146-S 1,4,6-Trichlorodibenzofuran, 1.2ml x 50ug/ml, toluene Price on request 94569 PCB Congener Internal Standard Mix Price on request