Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The Log Kow for 4-methylthiosemicarbazide is calculated to be -1.21.Considering this value,4-methylthiosemicarbazide has a low potential for bioaccumulation.

Key value for chemical safety assessment

Log Kow (Log Pow):
-1.21

Additional information

The Log Kow for 4-methylthiosemicarbazide is calculated to be -1.21.Considering this value,4-methylthiosemicarbazide has a low potential for bioaccumulation.

According to the Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance (ECHA, 2008), the impact of errors on model predictions for a log Kow value below 1 is usually less critical. Moreover, the value estimated is outside the applicability range of the reverse phase HPLC method (OECD GL 117) and very closed to the lowest value of the applicability range of the shake flask method (OECD GL 107). Therefore, it is considered that an experimental study is not needed.