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
Footnote 1

This substance was not identified under subsection 73(1) of the Canadian Environmental Protection Act, 1999 (CEPA 1999) but was included in this assessment as it was considered a priority on the basis of other human health concerns.

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Timelines
Date Activity
June 24, 2023 Publication in Canada Gazette, Part I, of a notice under section 71 of CEPA 1999.
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 1999 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 1999. 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 May 2023, the proposed amended Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills were published for a 60-day public comment period. The related notice was 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 proposed amendments include the addition of Basic Blue 7, Basic Violet 3, Basic Violet 4, and Malachite Green. Once finalized, the amendment would supersede the original Guidelines for reduction of dyes released from pulp and paper mills 2013, published in December 2013.

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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