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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information



Appearance/physical state/colour

The appearance was reported as an extremely pale yellow, slightly viscous liquid.

Melting point/freezing point

The melting point was < 50 °C.

Boiling point

No boiling point was observed, decomposition occurred at > 230 °C.


The relative density of di-n-butyltin-bis(methylmaleinate) was 1.38 at 20 ± 0.5 °C

Particle size distribution (Granulometry)

Data waiver written

Vapour pressure

The vapour pressure of the test item was determined to be 0.50 Pa at 25°C. A slight, but gradual drop in vapour pressure was then observed on repeated temperature cycling of the test item over the range 25 to 35°C, with individual values in the range 0.37 to 0.26 Pa for thirteen runs. Such vapour pressure characteristics are indicative of the gradual reduction of the more volatile fraction of the test item, likely to exist as impurities. To provide representative data for risk assessment on accidental release of the test item, the initial, highest value obtained was taken as the definitive result.

Partition coefficient

Data waiver written

Water solubility

Data waiver written

Surface tension

Data waiver written

Flash point

The flashpoint is 127 °C.


The test item was determined not to have an auto-ignition temperature of below 400°C.


Data waiver written


Data waiver written

Oxidising properties

Data waiver written