Organic Peroxides Group
These substances were identified for action under the Chemicals Management Plan (CMP). This screening assessment focuses on 2 of 6 substances referred to collectively as the Organic Peroxides Group.
Information sheet
| Substance group | CAS RN | Common name | DSL name | Final screening assessment | Conclusion on section 64 criteria | Follow-up activities |
|---|---|---|---|---|---|---|
| Organic Peroxides Group | 80-15-9 | Cumene hydroperoxide (CHP) | Hydroperoxide, 1-methyl-1-phenylethyl | HTML | Does not meet | None planned at this time |
| 80-43-3 | Dicumyl peroxide (DCUP) | Peroxide, bis(1-methyl-1-phenylethyl) | Information gathering |
Follow-up activities
While exposure of the general population to DCUP is not of concern at current levels, this substance is considered to have a health effect of concern due to its potential reproductive effects. Therefore, there may be a concern for human health if exposures were to increase. For this reason, the Government will carry-out follow-up activities to track changes in exposure, and review toxicity data and other relevant information pertaining to DCUP that may become available. The Government will use the data gathered through these follow-up activities to prioritize further information gathering or risk assessment work, as required.
| Date | Activity |
|---|---|
| June 22, 2019 | Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 153, No. 25. |
| April 28, 2018 | Publication and start of 60-day public comment period on the draft screening assessment (including follow-up activities for DCUP). The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 17. |
Background
Four other substances, CAS RNs 133-14-2, 614-45-9, 3006-86-8, and 3851-87-4, were identified as being part of the Organic Peroxides Group at the outset of the third phase of the CMP. These substances were subsequently determined to be of low concern to both human health and the environment, through other approaches. Conclusions for these 4 substances are provided in the Screening Assessment for Substances Identified as Being of Low Concern using the Ecological Risk Classification of Organic Substances and the Threshold of Toxicological Concern (TTC)-based Approach for Certain Substances.
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