Ethanol, 2,2'-[[4-[(2-bromo-6-chloro-4-nitrophenyl)azo]-3-chlorophenyl]imino]bis- (Disperse Brown 1:1)

CAS Registry Number 17464-91-4

What is it?

  • Ethanol, 2,2'-[[4-[(2-bromo-6-chloro-4-nitrophenyl)azo]-3-chlorophenyl]imino]bis-, also known as Disperse Brown 1:1, is an industrial chemical.

How is it used?

  • Disperse Brown 1:1 has previously been used as a colorant dye, mainly in textiles.
  • Small quantities of Disperse Brown 1:1 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, Disperse Brown 1:1 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?

  • Disperse Brown 1:1 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.
  • Disperse Brown 1:1 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 Disperse Brown 1:1 called a screening assessment.
  • Results of assessment indicate that although Disperse Brown 1:1 may remain in the environment for a long time, the substance is not expected to accumulate in organisms.
  • Furthermore, the quantity of Disperse Brown 1:1 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 Disperse Brown 1:1 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 Disperse Brown 1:1 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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