Dicyclopentadiene (DCPD) - information sheet
CAS Registry Number 77-73-6
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- About this substance
- Human and ecological exposures
- Key health and ecological effects (hazard)
- Risk assessment outcomes
- Related information
- The Government of Canada conducted a science-based evaluation, called a screening assessment, to address the potential for harm to Canadians and to the environment from dicyclopentadiene (DCPD).
- Under the Canadian Environmental Protection Act, 1999 (CEPA 1999), the risk posed by a substance is determined by considering both its hazardous properties (its potential to cause adverse human health or ecological effects) and the amount of exposure there is to people and the environment. A substance may have hazardous properties; however, the risk to human health or to the environment may be low depending upon the level of exposure.
- More information on assessing risk can be found in the Overview of Risk Assessment and related fact sheets, particularly on Types of Risk Assessment Documents and the Risk Assessment Toolbox.
- The ecological hazard and exposure potentials of this substance were classified using the Ecological Risk Classification of Organic Substances (ERC) Approach.
- As a result of the draft screening assessment, the Government is proposing that DCPD is not harmful to human health or to the environment at levels of exposure considered in the assessment.
About this substance
- The screening assessment focuses on the substance 4,7-methano-1H-indene, 3a,4,7,7a-tetrahydro-, also referred to as dicyclopentadiene (DCPD). It was assessed under the Chemicals Management Plan.
- According to information gathered by the Government, this substance does not occur naturally in the environment. It is primarily used in industrial applications, such as the manufacture of petroleum feedstock and paints and coatings. It is used in the manufacture of building or construction materials.
- In Canada, DCPD may be found in products available to consumers including automotive engine oil enhancers and gasoline.
- DCPD may be used in the manufacture of food packaging materials in Canada; however, exposure is not expected.
Human and ecological exposures
- Canadians may be exposed to DCPD from products available to consumers, such as automotive engine oil enhancers as well as gasoline (for example, from vehicle re-fuelling).
- According to information considered under the ERC Approach, DCPD was identified as having a low ecological exposure potential.
Key health and ecological effects (hazard)
- DCPD has been reviewed internationally by other organizations including the Organisation for Economic Cooperation and Development (OECD) Cooperative Chemicals Assessment Programme, and the United States Environmental Protection Agency National Center for Environmental Assessment. These assessments informed the human health effects characterization in the screening assessment.
- For DCPD, the important or critical effects identified for characterizing the risk to human health are potential effects on the kidneys and adrenal glands.
- According to information considered under the ERC Approach, DCPD was identified as having a low ecological hazard potential.
Risk assessment outcomes
- Based upon a comparison of levels to which Canadians may be exposed to DCPD, and the levels associated with health effects, the risk to human health for this substance is considered to be low.
- Based upon the outcome of the ERC Approach, DCPD is considered unlikely to be causing ecological harm.
- The Government of Canada published the Draft Screening Assessment for Dicyclopentadiene (DCPD) on December 7, 2019. The public is invited to comment on this assessment during the 60-day public comment period ending on February 5, 2020.
Proposed screening assessment conclusions
- As a result of the draft screening assessment, the Government is proposing that DCPD is not harmful to human health at levels of exposure considered in the assessment, and is not entering the environment at levels that are harmful to the environment.
- DCPD may be found in products available to consumers. Canadians should follow any safety warnings and directions related to the product and dispose of products responsibly.
- Visit Do it for a Healthy Home for more information on chemical safety in and around the home.
- Canadians who may be exposed to DCPD in the workplace should consult with their employer and an occupational health and safety (OHS) representative about safe handling practices, applicable laws, and requirements under OHS legislation and the Workplace Hazardous Materials Information System.
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