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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

The BCF of MTBE as determined in Japanese carp is 1.5

Key value for chemical safety assessment

BCF (aquatic species):
1.5

Additional information

Whole-body bioconcentration factors (BCFs) of 1.5 and 1.4 were reported for Japanese carp exposed to 10 and 80 mg/l MTBE in a flow-through system at 25 ºC. Fish which were exposed for 28 days and then transferred to clean water eliminated almost all MTBE residue within 3 days (Fujiwara et al., 1984). The BCFs indicate a low potential for bioconcentration. The BCF of 1.5 is used in the assessment.