Triarylmethanes Group
Information sheet
These substances were identified for action under the Chemicals Management Plan (CMP). The screening assessment focused on 6 substances referred to collectively under the CMP as the Triarylmethanes Group.
Summary of publications
| Substance group | CAS RN | Common name | DSL name | Proposed order and RIAS | Public comments on the draft screening assessment |
Final screening assessment |
Proposed risk management approach |
Conclusion on section 64 criteria |
Follow-up activities |
|---|---|---|---|---|---|---|---|---|---|
| Triarylmethanes | 548-62-9Footnote a | Basic Violet 3 | Methanaminium, N-[4-[bis[4-(dimethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-methyl-, chloride | HTML | HTML | HTML | HTML | Meets one or more of the criteria | Refer to proposed risk management approach |
| 569-64-2 | Malachite Green | Methanaminium, N-[4-[[4-(dimethylamino)phenyl]phenylmethylene]-2,5-cyclohexadien-1-ylidene]-N-methyl-, chloride | |||||||
| 1324-76-1Footnote a | Pigment Blue 61 | Benzenesulfonic acid, [[4-[[4-(phenylamino)phenyl][4-(phenylimino)-2,5-cyclohexadien-1-ylidene]methyl]phenyl]amino]- | None | None | Does not meet | None planned at this time | |||
| 2390-59-2 | Basic Violet 4 | Ethanaminium, N-[4-[bis[4-(diethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-, chloride | HTML | HTML | Meets one or more of the criteria | Refer to proposed risk management approach | |||
| 2390-60-5 | Basic Blue 7 | Ethanaminium, N-[4-[[4-(diethylamino)phenyl][4-(ethylamino)-1-naphthalenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-, chloride | |||||||
| 3844-45-9Footnote a | Brilliant Blue FCF | Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo-, hydroxide, inner salt, disodium salt | None | None | Does not meet | None planned at this time | |||
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| Date | Activity |
|---|---|
| April 6, 2024 | Publication of the amended Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills in the Canada Gazette, Part I: Vol. 158, No. 14. The amendments include Basic Blue 7, Basic Violet 3, Basic Violet 4, and Malachite Green. |
| June 24, 2023 | Publication in Canada Gazette, Part I, of a notice under section 71 of CEPA. |
| May 6, 2023 | Publication and start of 60-day public comment period on the proposed amended Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills. The related notice was published in the Canada Gazette, Part I: Vol. 157, No. 18. The proposed amendments include Basic Blue 7, Basic Violet 3, Basic Violet 4, and Malachite Green. |
| April 2, 2022 | Publication in the Canada Gazette, Part I: Vol. 156, No. 14 of a proposed order adding Basic Violet 3, Malachite Green, Basic Violet 4, and Basic Blue 7 to Schedule 1 to CEPA and start of 60-day public comment. |
| October 17, 2020 | Publication of the Final Screening Assessment for the Triarylmethanes Group. The Risk Management Approach for Certain Triarylmethanes, specifically CAS RNs 548-62-9, 569-64-2, 2390-59-2 and 2390-60-5 was also published for a 60-day public comment period. The related notice was published in the Canada Gazette, Part I: Vol. 154, No. 42. |
| December 8, 2018 | Publication and start of 60-day public comment period on the Draft Screening Assessment for the Triarylmethanes Group (including follow-up activities for CAS RNs 548-62-9, 2390-59-2, and 2390-60-5) and the Risk Management Scope for Certain Triarylmethanes, specifically: Basic Violet 3 (CAS RN 548-62-9), Malachite Green (CAS RN 569-64-2), Basic Violet 4 (CAS RN 2390-59-2), Basic Blue 7 (CAS RN 2390-60-5). The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 49. |
Information gathering
Section 71 CMP 2023
In June 2023, a notice was published in the Canada Gazette, Part I: Vol. 157, No. 25 – June 24, 2023 under section 71 of CEPA. This notice applies to Basic Blue 7 (CAS RN 2390-60-5), Basic Violet 3 (CAS RN 548-62-9), Basic Violet 4 (CAS RN 2390-59-2) and Malachite Green (CAS RN 569-64-2). More information is available on the Information gathering with respect to certain substances under the Chemicals Management Plan web page.
Guidelines
Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills
In April 2024, the amended Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills were published in the Canada Gazette, Part I. The Guidelines set out standards and good practices to observe to limit dye quantities released in the final effluent. The amendments include the addition of Basic Blue 7, Basic Violet 3, Basic Violet 4, and Malachite Green. The amended Guidelines supersede the original Guidelines for Reduction of Dyes Released from Pulp and Paper Mills 2013, published in December 2013.
More information on the Guidelines, including amendments, is available on the Pulp and paper dyes: release guidelines overview web page.
Background
A seventh substance, (CAS RN 632-99-5) was initially identified as being part of the Triarylmethanes Group at the outset of the third phase of the CMP. This substance was subsequently determined to be of low concern to both human health and the environment, through other approaches. The conclusion for this substance is provided in the Final Screening Assessment for the Rapid Screening of Substances with Limited General Population Exposure.
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