Revised Spiking Standard #2 Back Catalog number: 59903 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 63174 2,2',3,3',4,5,6'-Heptachlorobiphenyl (174) Price on request 55083 CWA MBAS Price on request 674800 D4-Sulfamethoxazole, 10mg Price on request