2-Naphthalenol, 1-[(2-chloro-4-nitrophenyl)azo]- (Pigment Red 4)

CAS Registry Number 2814-77-9

What is it?

  • 2-Naphthalenol, 1-[(2-chloro-4-nitrophenyl)azo]-, also known as Pigment Red 4, is an industrial chemical.

How is it used?

  • Pigment Red 4 is used as a red pigment in printing inks, paints and textiles.
  • Based on the most recent data available, Pigment Red 4 is not manufactured in Canada, but is imported into Canada.

Why did the Government of Canada assess it?

  • Pigment Red 4 was identified as a potential concern to the environment based on available information regarding possible persistence, accumulation and potential to cause harm to the environment.

How is it released to the environment?

  • Pigment Red 4 may be released to the environment during the consumer use of textiles containing the substance, through industrial processes, and through the flaking and chipping of paints during industrial and consumer use.

What is the Government of Canada doing?

  • The Government of Canada has conducted an evaluation of Pigment Red 4 based on science, called a screening assessment.
  • The Government of Canada has determined that Pigment Red 4 is not harmful to the environment, because it was found not to accumulate and not to cause harm to organisms. Therefore, no further action will be taken on Pigment Red 4.
  • The final screening assessment report was published on March 7, 2009.

What should Canadians do?

  • Because Pigment Red 4 is not a concern for the environment or human health, Canadians do not need to take any specific actions with respect to how they use this chemical, or products that contain that chemical.
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