Proposed Conclusion

The approach taken in this ecological screening assessment was to examine relevant supporting information and develop conclusions based on a risk quotient analysis in conjunction with the weight of evidence.

The quotients for risk to aquatic and soil-dwelling organisms from exposure to MBMBP are less than 1. MBMBP does not exceed the criterion for persistence in air as defined in the Persistence and Bioaccumulation Regulations of CEPA 1999 (Government of Canada, 2000), and the potential for long-range transport is also low. MBMBP is persistent in water according to the results of OECD biodegradation protocol 301C, but it has low water solubility. No monitoring data were found for current levels or trends in environmental concentrations.

The available information suggests that MBMBP does not contribute to stratospheric ozone depletion and that its contributions to ground-level ozone formation and global warming are negligible.

It is therefore concluded that 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-methylphenol] is not entering the environment in a quantity or concentration or under conditions that have or may have an immediate or long-term effect on the environment or its biological diversity or that constitute or may constitute a danger to the environment on which life depends.