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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Phototransformation in air: for the C16 Tetrabutane isomers, the calculated half-life in the atmosphere is less than 11 hours for the reaction with naturally occuring OH radicals.

Hydrolysis is not expected for Tetrabutane.

Biodegradation was tested in 1993 and 2018 (OECD310), results are in discussion with the evaluating MSCA. Under the tested conditions, readily biodegradation could not be demonstrated, but showed a good potential for biodegradation.

Biodegradation simulation test are technically not feasable as justified in IUCLID 5.2.2 and 5.2.3.

The paper "Tetrabutane Fate Atmosphere.pdf" is atttached to this endpoint summary, discussing tetrabutane and the P-Criterion.

According to distribution model calculations, atmospheric oxidation is the relevant degradation pathway for C16 -Tetrabutane and persistence time for the worst case emission scenario (100% to water) is below the persistence criterium of 40 days for water.


the BCF for neither more nor less branched C15 or C16 hydrocarbons does exceed 945 L kg-1.

Adsorption: Estimated Tetrabutane log Koc is 7.7.

The Henry's law constant at 25 °C for 4 representative C16 isomers (linear to extremely branched) of the UVCB substance tetrabutane are 2.9x10exp6 Pa m3/mol (bond method)  respective 5.4x10exp6 - 1.6x10exp7 Pa m3/mol (group method).

Additional information