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Environmental fate & pathways

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Regarding aquatic bioaccumulation, the substance is thought to have limited bioaccumulation potential, at least not enough to be classified as a (very) bioaccumulative substance. Using the available QSAR models (e.g.TGD BCF fish, BCFBAF v3.00 in EPISuite 4.0), the predicted BCF values are below 32.1 L/kg wet-wt () (See Chemical Safety Report, section 8). The predicted values are far below the threshold value of 5000 L/kg for a very bioaccumulative substance, and well below the value of 2000 L/kg for bioaccumulative substances.Therefore, further testing is not considered necessary.

This is further endorsed by the potential for bioaccumulation to diminish as log Kow increases above a value of 6. Substances with log Kow between 3 and 6 are considered highly accumulating; however no substantial bioconcentration is assumed for compounds having log Kow with values less than 3 or greater than 6. This correlation has been validated by comparison of published BCF values with the respective calculated log Kow values; the results generally revealing increasing BCF values with increasing log Pow. For compounds having log Kow greater than 6, a gradual decrease of the BCF is observed. It has been hypothesised within the published literature that a high log Kow is more an effect of solubility than a tendency of the substance to be lipophilic.

 

Suitable references for this are listed in:

 

Nagel, R. ; Loskill, R.: Bioaccumulation in Aquatic Systems - Contributions to the Assessment.Proceedingsof an International Workshop Weinheim: VCH Verlagsgesellschaft, Fraunhofer IUCT (now IME), 1991 ISBN: 3-527-28395-1 pp.43-66 : Abb.,Tab.

 

Gary M Rand: Fundamentals of Aquatic Toxicology, Effects, Environmental Fate and Risk Assessment

Second Edition; Taylor & Francis, 1995, ISBN:1-56032-091-5 pp.626-629

 

Guidance for Meeting the SIDS Requirements: Chemical Right-to-Know Initiative,

http://www.epa.gov/opptintr/chemrtk/sidsappb.htm, Section 2.5

 

The Revised GESAMP Hazard Evaluation Procedure for Chemical Substances Carried by Ships, IMO/FAO/UNESCO±IOC/WMO/WHO/IAEA/UN/UNEP, Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP), The Revised GESAMP hazard evaluation procedure; Pow ca. >7.0 equates to BCF not measurable

As the substance is not manufactured in Europe and at formulation or use waste is not disposed of via a waste water treatment plant, but incinerated, the environment is not expected to be exposed.Therefore, further testing is not considered necessary.