Benzenamine, 4-[(2,6-dichloro-4-nitrophenyl)azo]-N-(4-nitrophenyl)- (DNAN)

CAS Registry Number 72927-94-7

What is it?

  • Benzenamine, 4-[(2,6-dichloro-4-nitrophenyl)azo]-N-(4-nitrophenyl)-, also known as DNAN, is an industrial chemical.

How is it used?

  • DNAN has previously been reported to be used as a colorant.
  • Small quantities of DNAN are believed to be in commerce; however, there is no recent information on manufacturing, importation or use of this substance.

Why did the Government of Canada assess it?

  • Prior to assessment, DNAN was identified as a potential concern to the environment based on information regarding possible persistence, accumulation in organisms and potential to cause harm to organisms.

How is it released to the environment?

  • DNAN may be released to the environment during industrial processes and consumer use.
  • Upon its release, most of the substance is expected to end up in solid waste disposal sites. A significant proportion is also estimated to be released to sewer water.
  • DNAN may remain in the environment for a long time when released. However, data suggests that the substance does not significantly accumulate in or directly harm organisms.

What are the results of the assessment?

  • The Government of Canada has conducted a science-based evaluation of DNAN called a screening assessment.
  • Results of the final assessment indicate that although DNAN may remain in the environment for a long time, the substance is not expected to accumulate in organisms.
  • Furthermore, the amount of DNAN that may be released to the environment is below the level expected to cause harm to organisms.
  • The Government of Canada has therefore determined that DNAN is not entering the environment in a quantity or under conditions that constitute a danger to the environment.

What is the Government of Canada doing?

  • Based on the conclusion of the final screening assessment, no further action is required for this substance.
  • The final screening assessment was published on August 22, 2009.

What could Canadians do?

  • Since DNAN is not presently a concern for the environment or human health, Canadians do not currently need to take any specific actions with respect to this chemical.
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