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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Bioaccumulation: aquatic / sediment

A bioaccumulation study is currently performed at a test laboratory following on to the final decision of ECHA on a compliance check, which was issued 01 August 2017.

Due to difficulties in the setup of the study, it is still under progress. Details can be found in the up to date endpoint study record under 5.3.1 and the statments by the test facility attached as background material for complete information.

Because new data is generated at this time, the BCF value is under revision and the previous data generated via QSAR is regarded only as supporting information.

As no experimental results are available for bis(2,6-diisopropylphenyl)carbodiimide up to now, the bioconcentration factor (BCF) was determined by the computer program BCFBAFWIN v3.01 (EPIWIN software) by US-EPA (Chemservice S.A., 2011) as supporting information. The regression-based estimate (traditional method) results in a BCF of 1912 L/kg wet-wt. Using the Arnot-Gobas method, which is based on the mechanistic first principles, the BCF results in a value of 1209 L/kg wet-wt.

For DIPA (2,6 -diisopropylaniline) as the relevant hydrolytical degradation product of carbodiimide BCF was also determined also by BCFBAFWIN v3.01 (Chemservice S.A., 2016). Using the regression-based estimate (traditional method) a BCF of 58.23 L/kg wet-wt was calculated. Using the Arnot-Gobas method, the BCF results in a value of 69.94 L/kg wet-wt. It can be concluded that relevant bioaccumulation of carbodiimide and of the hydrolysis product DIPA is not to be expected. Regarding environmental fate, DIPA should be assessed, since Carbodiimide is hydrolytically unstable.

Bioaccumulation: terrestrial

This is no mandatory endpoint to be fulfilled for a registration of a tonnage band of 100 - 1000 tons/year according to REACH Regulation (EC) 1907/2006.

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