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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Boiling point

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Description of key information

Decomposition at T > 160.75 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
363.48 °C

Additional information

The boiling temperature of Dibutyl phosphonate was investigated. The Differential Scanning Calorimetry method was used. The procedure used was similar to OECD TG 103. After melting at -12.3 °C, the decomposition of test item starts at 160.75 °C with a peak at 241.81 °C correlated to ΔH= 156.5. J/g. 

The boiling temperature of the test substance could not be determined because of its thermal decomposition.

An estimated value of boiling point of 363.48 °C has been calculated by EPI Suite v.4.11 using the SMILES notation O=P(OCCCCCCCC)OCCCCCCCC.