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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Hydrolysis

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Administrative data

Link to relevant study record(s)

Description of key information

The half-life time of the test substance at room temperature is: 
pH 4: t1/2 < 4 minutes
pH 7: t1/2 < 4 minutes
pH 9: t1/2 < 4 minutes
According to the guideline, the test susbstance is considered hydrolytically unstable and no further tests are required.
A hydrolysis test was also performed on MPKO, the hydrolytic product of OS1600. In all tests performed, a decrease in concentration was observed. At the end of the main tests, concentrations became stable at 50 -60% of the initial concentration. This indicates that equilibrium is formed and that this is not hydrolysis. MPKO is therefore considered hydrolytically stable (i.e. half-life time of > 1 year at 25°C) at pH 4, pH 7 and pH 9.

Key value for chemical safety assessment

Half-life for hydrolysis:
4 min
at the temperature of:
20 °C

Additional information