Multi-Stakeholder Consultation on BNST Risk Management Measures – Prohibition of Certain Toxic Substances


Closed Consultation

When: November 18, 2010
Where: by teleconference

The RCEN selected two ENGO delegates to take part in an Environment Canada consultation to inform interested stakeholders of the proposed management measures; to encourage discussion and to give interested and affected parties an opportunity to provide input into the BNST proposed management measure; and to ensure that any questions or concerns from interested stakeholders are identified. This consultation focused on the environmental and economic issues associated with the proposed prohibition of the substance.

Delegate Report
ENGO Report on Environment Canada Public Consultation Meeting on Proposed Risk Management for BNST, CAS No. 68921-45-9

Selected Delegates:

  • Mary Richardson, Crooked Creek Conservancy Society of Athabasca, AB
  • Anna Tilman, International Institute of Concern for Public Health, ON

Selected Alternates:

  • Gabrielle Kretzschmar, New Brunswick partners in Agriculture, NB
  • Sandra Boswell, Allergy & Environmental Illness Group, PEI

The selected ENGOs' report includes:

  • Comments on the Proposed Risk Management Measure for BNST (CAS RN 68921-45-9)
  • Comments on the Discussion Document
  • Feedback on the consultation process
  • Perspectives and positions as ENGO representative(s) on the issues discussed

Participants in this consultation included:

  • NGOs with experience in assessing and managing toxic substances such as BNST
  • Industry and/or associations within lubricant sector that use and/or purchase BNST for the manufacture of lubricant oils.
  • Industry or associations that manufacture or supply BNST to the lubricant oil manufacturing sector and to additive package formulation sector.
  • Industry and/or associations involved in the manufacture, import or use of BNST in miscellaneous industry sectors.
  • Other interested stakeholders
  • Federal, Provincial and Territory Governments with regulatory power to controlling chemical substances in the environment.

The final screening assessment report concluded that BNST (Benzenamine, N-phenyl-, Reaction Products with Styrene and 2,4,4-Trimethylpentene, Chemical Abstract Service Registry Number (CAS RN) 68921-45-9)) 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 final screening assessment report concluded that BNST meets the criteria for persistence and bioaccumulation as defined in the Persistence and Bioaccumulation Regulations made under CEPA 1999. The presence of BNST in the environment results primarily from human activity.

As proposed in the Risk Management Approach for BNST, published in August 2009, the Government of Canada indicated it would consider:

  • The addition of BNST to the Prohibition of Certain Toxic Substances Regulations, 2005 in order to prohibit the use, sale, offer for sale and import of BNST and products or formulations containing BNST. Although releases from manufacturing facilities are estimated to be small, controls, including a manufacturing prohibition, will be considered as part of the consultation process.
  • BNST may be considered for addition to the Environmental Emergency Regulations if manufacturing activities involving BNST continue to be permitted.

The proposed measure is intended to achieve the lowest level of release of BNST to the environment that is technically and economically feasible from all life-cycle stages.

The final screening assessment reports for these substances and the Proposed Risk Management Approach are available at:

RCEN E-Bulletin


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