Selenium-containing Substance Grouping
Certain selenium-containing substances are among those identified as priorities for action for the second phase of the Chemicals Management Plan (CMP). The selection of these selenium-containing substances for action is based on the categorization process completed in 2006.
- Adding substances to Schedule 1
- Summary of publications
- Timelines
- Final screening assessment and proposed risk management approach
- Information gathering
Adding substances to Schedule 1
Selenium and its compounds have been added to Schedule 1.
- Order adding selenium and its compounds: Canada Gazette, Part II: Vol. 155, No. 10 - May 12, 2021.
Summary of publications
Some of these substances (CAS RNs 3425-46-5, 7782-49-2, 7783-07-5 and 144507-49-3) were not identified under subsection 73(1) of the Canadian Environmental Protection Act, 1999 (CEPA 1999) but were included as part of the moiety-based assessment.
| CAS RN | Chemical substance | Final RIAS | Public comments on the draft screening assessment and risk management scope | Final screening assessment | Public comments on the proposed risk management approach and proposed Schedule 1 order | Proposed risk management approach |
|---|---|---|---|---|---|---|
| 1306-24-7 | Cadmium selenide (CdSe) | HTML | HTML | HTML | HTML | HTML |
| 3425-46-5 | Selenocyanic acid, potassium salt | |||||
| 5819-01-2 | Dodecane, 1,1'-selenobis- | |||||
| 7446-08-4 | Selenium oxide (SeO2) | |||||
| 7446-34-6 | Selenium sulphide | |||||
| 7488-56-4 | Selenium sulfide (SeS2) | |||||
| 7782-49-2 | Selenium | |||||
| 7783-00-8 | Selenious acid | |||||
| 7783-07-5 | Hydrogen selenide (H2Se) | |||||
| 7791-23-3 | Seleninyl chloride | |||||
| 10102-18-8 | Selenious acid, disodium salt | |||||
| 10214-40-1 | Selenious acid, copper(2++) salt (1:1) | |||||
| 12002-86-7 | Silver selenide (AgSe) | |||||
| 12069-00-0 | Lead selenide (PbSe) | |||||
| 12137-76-7 | Palladium selenide (PdSe) | |||||
| 12214-12-9 | Cadmium selenide sulfide (Cd2SeS) | |||||
| 12626-36-7 | Cadmium selenide sulfide (Cd(Se,S)) | |||||
| 12656-57-4 | C.I. Pigment Orange 20 | |||||
| 13410-01-0 | Selenic acid, disodium salt | |||||
| 20405-64-5 | Copper selenide (Cu2Se) | |||||
| 21559-14-8 | Selenium, bis(diethylcarbamodithioato-S)bis(diethylcarbamodithioato-S,S')- | |||||
| 56093-45-9 | Selenium sulfide | |||||
| 58339-34-7 | C.I. Pigment Red 108 | |||||
| 67711-98-2 | Slags, dore furnace | |||||
| 69029-73-8 | Leach residues, tellurium | |||||
| 121053-28-9 | Electrolytes, cobalt-manufg. | |||||
| 129618-35-5 | Electrolytes, copper-manufg. | |||||
| 144507-49-3 | Slimes and Sludges, sulfuric acid manuf., sulfur dioxide cooling tower, selenium-contg. | |||||
| 152923-45-0 | Slimes and Sludges, mercury conc. roasting off gas condensate |
| Date | Activity |
|---|---|
| May 12, 2021 | Publication in Canada Gazette, Part II, of a final order adding selenium and its compounds to Schedule 1 to CEPA 1999. |
| April 18, 2018 | Deadline for submission of public comments on the proposed order adding selenium and its compounds to Schedule 1 to CEPA 1999. |
| February 17, 2018 | Publication in Canada Gazette, Part I, of a proposed order adding selenium and its compounds to Schedule 1 to CEPA 1999, and start of 60-day public comment period. |
| February 14, 2018 | Deadline for submission of public comments on the proposed risk management approach. |
| December 16, 2017 | Publication in Canada Gazette, Part I, of final assessment decisions under paragraphs 68(b) and (c) and subsection 77(6) of CEPA 1999, release of proposed risk management approach and start of 60-day public comment period on the proposed risk management approach. |
| September 16, 2015 | Deadline for submission of public comments on the draft screening assessment and the risk management scope. |
| July 18, 2015 | Publication in Canada Gazette, Part I, and start of 60-day public comment period on the draft screening assessment and the risk management scope. |
| December 1, 2013 | Deadline for submission of any voluntary information by interested stakeholders. |
| October 1, 2013 | Deadline for submission of information for the section 71 notice (without an extension). |
| May 25, 2013 | Release of the section 71 notice with respect to certain selenium-containing substances and the accompanying technical documents. |
| If needed, information gathering tools could be used to inform potential risk management actions. | |
Final screening assessment and proposed risk management approach
In December 2017, the Final Screening Assessment for Selenium and its Compounds was released and the related notice was published in the Canada Gazette, Part I: Vol. 151, No. 50 – December 16, 2017.
The final screening assessment focuses on the selenium moiety (selenium and its compounds), and therefore includes substances containing selenium in all oxidation states (selenite, selenate, elemental, selenide), organic selenium, and all forms of selenium found in the environment. The selenium assessment encompasses all 29 selenium-containing substances on the Domestic Substances List (DSL), including those that met categorization criteria.
The final screening assessment concluded that selenium and its compounds, which includes but is not limited to the 29 selenium-containing substances on the DSL, are harmful to the environment and for certain subpopulations in Canada that have higher selenium intake; however, they are not considered harmful to the general population of Canada. The substances therefore meet the criteria under paragraph 64(a) and 64(c) of CEPA 1999.
A proposed risk management approach was also released at the same time for a 60-day public comment period.
In July 2015, the draft screening assessment and the risk management scope were released and the related notice was published in the Canada Gazette, Part I: Vol. 149, No. 29 - July 18, 2015. There was a 60-day public comment period associated with these publications.
Information gathering
Mandatory survey - section 71 notice
In May 2013, a notice was issued in the Canada Gazette, Part I: Vol. 147, No. 22 - May 25, 2013 under section 71 of CEPA 1999. This notice applied to a subset of 23 substances which are part of the Selenium-containing Substance Grouping.
A compilation of the non-confidential data received on selenium-containing substances in response to the section 71 notice, including information submitted on a voluntary basis, is available via the Government of Canada Open Data Portal. Along with the compilation, a non-confidential information summary provides general information on the volume of information received and the substances, activities, substance functions, commercial uses and sectors most often reported.
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