Urban dust - Organic contaminants, 2g Back Catalog number: NIST-1649B Availability: In the manufacturer's stock Price on request - + Recommended 93641 4,4'-Dibromooctafluorobiphenyl Price on request 10963.17-K-ME Diphenhydramine hydrochloride ,1000 µg base/mL,MeOH,1mL, Price on request MRX Mirex, 1.2mL x 100ug/mL, nonane Price on request