Proposed Conclusions for the Environment

DNOC meets the criteria for categorization owing to its persistence in air and inherent toxicity to aquatic organisms. DNOC is not bioaccumulative.

When comparing effect thresholds with conservatively estimated exposure values for different media, resultant risk quotients are less than unity. DNOC is believed to be used by a limited range of industrial facilities in Canada.

Based on available data and weight of evidence, it is proposed that DNOC is not entering the environment in a quantity or concentration or under conditions that have or may have an immediate or long-term harmful effect on the environment or its biological diversity or that constitute or may constitute a danger to the environment on which life depends.