Urban dust - Organic contaminants, 2g Back Catalog number: NIST-1649B Availability: In the manufacturer's stock Price on request - + Recommended 11746.12-100-IO 2,2',3,4',5,6'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request DF-27-S 2,7-Dichlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 93111 Aroclor 1254 Price on request