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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Tetrabutylammonium hydrogen sulphate is a stable,hygroscopic, white solid at 101325 Pa and 20 °C.

No experimental data are available for the substance.


Estimated data were calculated by EPI Suite 4.1.:

- predicted melting point is 256.47 °C;

- predicted boiling point is 593.92 °C;

- predicted vapour pressure is 9.06 *10^-14 Pa at T= 25°C;

- predicted partition coefficient n-octanol/water is log Kow= 0.96 at T= 25°C;

- predicted water solubility is 1081 mg/l at 25°C


TBHS is a cationic (quaternary ammonium) surfactant.

Since it is a solid, flash point can be waived.

Tetrabutyl ammonium hydrogen sulphate is not expected to be explosive based on its structure.

Tetrabutyl ammonium hydrogen sulphate is not expected to be strong oxidizing agent: TBHS contains bonds sulphur-oxygen but the oxygen balance is negative.

The pH of the water solution 55% is 1.5.