The Substances Lists
The Domestic Substances List (DSL) is the sole basis
for determining whether a substance is new for the purposes
of the Canadian Environmental Protection Act, 1999
(CEPA, 1999). Substances on the DSL do not require
notification unless they are proposed for a Significant New
Activity (SNAc) as indicated on the DSL. Substances not appearing
on the DSL are considered to be new to Canada and
are subject to notification under the New Substances
Notification Regulations (Chemical and Polymers) and New Substances Notification Regulations (Organisms) of CEPA, 1999.
The Non-domestic Substances List (NSDL) specifies
substances that are not on the DSL but are in commercial use
internationally. As a basis for this list, Environment
Canada used the United States Toxic Substances Control
Act (TSCA). Substances on the NSDL are subject to
notification under the Regulations of CEPA, 1999 but may require different information in the New Substance Notification (NSN) packages.
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