Chemical Abstract Services registry numbers from New Substances Program in Canada Gazette

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The following list of the Chemical Abstract Services (CAS) Registry Numbers are substances found on the Domestic Substances List (DSL) or the Non-domestic Substances List (NDSL) or that are subject to a Ministerial Condition or Prohibition or for which Significant New Activity (SNAc) provisions of the Act apply.

The DSL is the sole basis for determining whether a substance is new for the purposes of the Canadian Environmental Protection Act, 1999. Locating your substance on the DSL does not constitute an endorsement from Environment Canada in respect of use or sale in Canada. Furthermore, the status of the substance on the DSL does not constitute an exemption from the application of any other laws (whether statutes, regulations or other) that may also apply to this substance or related activities.

The list contains five different flags for substances, however, depending on different situations some flags can be combined together (e.g. T-S, N-S, T-P, etc.). Some of the flags are used to indicate to notifiers that additional notification requirements may be necessary for the substance being manufactured or imported. The flags are:

  • The "S" flag: The letter "S" after a substance identifier indicates that the Significant New Activity (SNAc) provisions of the Act apply to the substance (see the Significant New Activity (SNAc) Notices for Chemicals and Polymers).

  • The "S' (prime)" flag: The letter " S' " (`S prime`) after a substance identifier indicates that the Significant New Activity (SNAc) provisions of the Act apply to substance that was already listed on the DSL (see the Significant New Activity (SNAc) Notices for Chemicals and Polymers).

  • The "P" flag: The letter "P" after a substance identifier indicates that the substance was assessed and added to the DSL on the basis that it met the Reduced Regulatory Requirements (RRR) polymer criteria (see section 3.4.1.3 of Guidelines for the Notification and Testing of New Substances: Chemicals and Polymers) and that there was no suspicion of toxicity with this form of the substance. Please note that the purpose of the "P" flag is to indicate that relevant information respecting the flagged polymer must be renotified if anyone, including the original notifier, manufactures or imports the polymer, in Canada, in a form that no longer meets the RRR polymer criteria.

  • The "T" flag: The letter "T" after a substance identifier indicates that the substance was manufactured or imported during the transitional period (e.g. between January 1, 1987, and July 1, 1994).

  • The "N" flag: The letter "N" after a substance identifier indicates that the substance was manufactured or imported after July 1, 1994.

When there is no flag associated with a substance that is listed on the DSL, the substance was added to the list via a nomination of the substance under section 66 of the Act (see section 2.1.3 of Guidelines for the Notification and Testing of New Substances: Chemicals and Polymers).

Last updated: October 25, 2016

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