TCPP and TDCPP

CAS Registry Number 13674-84-5 (TCPP)
CAS Registry Number 13674-87-8 (TDCPP)

What are they?

  • The substances 2-Propanol, 1-chloro-, phosphate (3:1) and 2-Propanol, 1,3-dichloro-, phosphate (3:1), also known as TCPP and TDCPP respectively, are industrial chemicals. They do not occur naturally in the environment.

How are they used?

  • In Canada, TCPP and TDCPP are used as flame retardants. These substances are applied to materials to slow the ignition and spread of fire.
  • Based on the most recent data, TCPP and TDCPP are not manufactured in Canada, but are imported into the country as pure substances and in manufactured items.
  • In Canada, TCPP is used as an additive flame retardant in the manufacturing of building or construction materials (for example, polyurethane spray foam insulation). It is contained in imported products with the same functional use. It is also found in imported manufactured products that contain flexible polyurethane foam (upholstered furniture and mattresses) and as a textile waterproofing spray intended for consumer use.
  • TDCPP is used in the manufacturing of flexible polyurethane foam in Canada, used in upholstered furniture and mattresses.
  • Internationally, TCPP and TDCPP are used as flame retardants and plasticizers, in textile upholstery, paints, and adhesives.

Why is the Government of Canada assessing them?

How are Canadians exposed to them?

  • Canadians may be exposed to TCPP and TDCPP through outdoor and indoor air, drinking water and food, including breast milk.
  • In addition, Canadians may be exposed to TCPP and TDCPP through manufactured items intended for consumers. These may include: spray foam; waterproofing products; and upholstered furniture and mattresses containing foam.

How are they released into the environment?

  • In Canada, TCPP and TDCPP are expected to be released to the environment from industrial manufacturing and processing activities.
  • Releases from uses, service life, and disposal of commercial products and products available to consumers containing TCPP and TDCPP are expected to be low.

What are the results of the assessment?

  • The Government of Canada has conducted a science-based evaluation of TCPP and TDCPP, called a screening assessment.
  • Screening assessments address the potential for harm to the general population of Canada and to the environment.
  • Results of the draft screening assessment indicate that although TCPP and TDCPP are not expected to accumulate in organisms, these substances may remain in the environment for a long time.
  • Quantities of TCPP and TDCPP that may be released to the environment, however, are below the levels expected to cause harm to organisms.
  • The Government of Canada is therefore proposing that TCPP and TDCPP are not entering the environment at levels that constitute a danger to the environment.
  • However, the Government of Canada is also proposing that TCPP is harmful to human health due to potential exposure resulting from the use of certain manufactured items, specifically foam-containing furniture, whereas TDCPP is not.

What is the Government of Canada doing?

  • The Government of Canada published the Draft Screening Assessment for TCPP and TDCPP and the Proposed Risk Management Scope for TCPP on October 8, 2016 followed by 60-day public comment periods, ending December 7, 2016.
  • If the proposed conclusion is confirmed in the final screening assessment, the Government of Canada will consider options for risk management, including a measure to limit TCPP to 0.1% by weight in certain products available to consumers, specifically mattresses and upholstered furniture.
  • Although TDCPP is not considered harmful to the environment or human health at current estimated levels of exposure, there may be concerns if import and use quantities were to increase in Canada. Follow-up activities will be considered to inform prioritization and evaluation of future new or increased use of this substance.

What can Canadians do?

  • The health risks associated with a chemical depend on the hazard (its potential to cause health effects) and the amount of chemical to which a person is exposed. TDCPP is not presently a concern for the environment or for the health of the general population in Canada at current levels of exposure. TCPP is not a concern for the environment but is a concern for the health of the general population in Canada at current levels of exposure.
  • As a general precaution, Canadians are reminded when using any product, to carefully follow safety warnings and directions and to dispose of the products appropriately.
  • Canadians who may be exposed to TCPP and TDCPP in the workplace should consult with their employer and occupational health and safety (OHS) representative about safe handling practices, applicable laws and requirements under OHS legislation and the Workplace Hazardous Materials Information System (WHMIS).
  • It is recommended to replace or repair any damaged foam containing products including upholstered furniture and mattresses.
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