State of the Science Report for DNOC

Identity, Uses and Sources of Exposure

Data submitted in a survey conducted in 2000 indicated that the importation of DNOC into Canada was in the range of 100-1000 tonnes/year (Environment Canada, 2001). Uses of DNOC are similar to those reported elsewhere (IPCS, 2000). While previously used as a pesticide, DNOC is no longer registered for this purpose in Canada, and therefore this use is not likely to be a continuing source of exposure (PMRA, 2000). The predominant current use of DNOC is in the plastics industry as a polymerization inhibitor (IPCS, 2000). Sources of exposure in the general environment are likely to be limited to fugitive releases from industrial sites and the combustion of fossil fuels . There is no indication that DNOC is present in consumer products.