CWA Total Organic Halides Back Catalog number: 55133 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 66189 2,3,3',4,4',5,5'-Heptachlorobiphenyl (189) Price on request 52036 Calibration Standard Mix 4 Price on request N-11638-250MG Dibutyl chlorendate, 250mg Price on request