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How Do I Find the Results of DSL Categorization?

A search tool is provided to enable users to locate categorization results. These results state, for each substance, whether or not it meets the Government of Canada criteria for categorization, and if so, whether the decision was made based on environmental or human health concerns (or both). In addition, the results show which environmental categorization criteria were met for each substance (in other words, the basis on which the decision was reached).

The results are presented in table format, and include the following information on each substance:

The CAS (Chemical Abstracts Services) Registry is the common international method for indexing chemical substances. In the CAS Registry, all known chemicals are assigned unique CAS numbers. Although a specific chemical may be known by several different names, it has only one CAS number.

Chemical name
The search engine will locate all DSL substances that contain, as part of their chemical name, the text that is entered by the user.

Meets CEPA Categorization Criteria (yes/no)
A substance meets the Government of Canada's criteria for categorization if it meets the human health criteria and/or the environmental criteria for categorization as defined in Section 73 of CEPA 1999.

Meets Human Health Categorization Criteria (yes/no)
A substance meets the human health categorization criteria as defined in Section 73 of CEPA 1999 if it has great potential for human exposure or if it is persistent and/or bioaccumulative and inherently toxic to humans.

Human Health Priorities (high/moderate/low/post 2006)
Substances designated as "human health priorities" are substances that did not necessarily meet the strict criteria of the categorization exercise, but do require further attention from a human health perspective because they have potential for human exposure and/or they are inherently toxic to humans. Visit Health Canada's website for more information.

Meets Environmental Criteria for Categorization (yes/no)
A substance meets the environmental criteria for categorization if it is Inherently Toxic to aquatic organisms, and it is Persistentand/orBioaccumulative in the environment.

Persistent (yes/no)
Persistent chemical substances take a very long time to break down in the environment - sometimes many years. Because they last for so long, they can travel long distances and pollute a much wider area than those that break down quickly.

Bioaccumulative (yes/no)
Bioaccumulative chemical substances can be stored in the organs, fat cells or blood of living organisms. Concentrations can build up and reach very high levels, and can also be transferred up the food chain.

Inherently toxic to aquatic organisms (yes/no)
Chemical substances that are known, through laboratory or other studies, or models to have a harmful effect on aquatic organisms, were considered, for the purpose of categorization, to represent substances that are inherently toxic to the environment.