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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

With the shake-flask method a logPow of 2.42 was determined at pH 7 for MBT (Monsanto, 1980).

Key value for chemical safety assessment

Additional information

SMBT is an organic salt of strong base NaOH and weak acid of MBT and sole marketed as aqueous solution with a base character. The presence of MBT determines the partition behaviour of the whole organic salt under environmental condition (pH 4 -9); and hence a read across approach is used as a worst case consideration.