QC Standard 2 Back Catalog number: 52085 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672883 Propoxur, 250mg Price on request 66030 2,4,6-Trichlorobiphenyl Price on request 8910.14-100-T 5-Methyl-2,2',4,5'-tetrachlorodiphenylmethane Price on request