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Consultation Document: Development of Proposed Environmental Release Guidelines for MAPBAP Acetate


Environment Canada

March 2012

1. Introduction

Methylium, [4-(dimethylamino)phenyl]bis[4-ethylamino)-3-methylphenyl]-, acetate, also known as MAPBAP acetate, belongs to a class of dyes known as cationic triarylmethanes. It is used as a cationic dye, mainly in the production of paper products.

The Final Screening Assessment Report (fSAR) for MAPBAP acetate was published by Environment Canada and Health Canada in the Canada Gazette, Part I, on July 31, 2010, under subsection 77(6) of the Canadian Environmental Protection Act, 1999 (CEPA 1999). The fSAR concluded that MAPBAP acetate is entering or may be entering the environment in a quantity or a concentration or under conditions that have or may have an immediate or long-term harmful effect on the environment or its biological diversity.

The fSAR also concluded that MAPBAP acetate meets the criteria for persistence but does not meet the criteria for bioaccumulation, as defined in the Persistence and Bioaccumulation Regulations under CEPA 1999. The presence of MAPBAP acetate in the environment results primarily from human activity.

The fSAR did not conclude that MAPBAP acetate meets the conditions set out in subsection 77(4) of CEPA 1999. As a result, MAPBAP acetate is not subject to the virtual elimination provisions under CEPA 1999 and will be managed using a life­cycle approach, to prevent or minimize its release into the environment.

The proposed human health objective for MAPBAP acetate is to minimize human exposure to the greatest extent practicable. As a human health precaution, the Government of Canada plans to implement the Significant New Activity provisions under CEPA 1999 for this substance. This would require that any proposed new manufacture, import or use be subject to further assessment and determine if the new activity requires further risk management consideration.

The proposed environmental objective for MAPBAP acetate is to reduce releases of the substance to soil and water. Environment Canada is planning the development of Environmental Release Guidelines, referred to hereafter as the “Guidelines,” for MAPBAP acetate to limit releases to water from pulp and paper mills using MAPBAP acetate or products containing MAPBAP acetate, under paragraph 54(1)(c) of CEPA 1999. The proposed Guidelines will assist pulp and paper facilities using MAPBAP acetate or products containing MAPBAP acetate to predict when the concentrations in effluent may have an effect on the receiving waters, and allow them to adjust their supplies and processes accordingly.

In support of the development of the proposed Guidelines, Environment Canada will be holding public consultation sessions in March 2012, with the following objectives:

  • Provide background and context on the risk management approach for MAPBAP acetate.
  • Provide an opportunity for stakeholders to comment on the development of the proposed Guidelines for the reduction of MAPBAP acetate released from pulp and paper mill effluents and on the proposed risk management of MAPBAP acetate.

The Government of Canada is committed to providing interested and affected stakeholders with the opportunity to take part in consultations at this stage in the development of the Guidelines. All interested stakeholders may comment on the proposed Guidelines in writing by mail, fax or email to the address provided in Section 3 of this document.

1. Introduction