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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Description of key information

TBHS is corrosive for the skin and could cause severe eye damage.

Key value for chemical safety assessment

Respiratory irritation

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

As reported in Safety data sheet of the registrant the pH of the Tetrabutylammonium hydrogen sulphate 55% in water is about 1.5. A lower pH is reasonable expected for the pure registered substance. According to REACH regulation (EC n. 1907/2006), annex VII, column 2, the study does not need to be conducted if the available information indicates that the criteria are met for classification as corrosive to the skin or irritating to eyes. According to the CLP Regulation (EC n. 1272/2008) a substance is considered corrosive to skin (Skin corrosive Category 1) if it has a pH of 2 or less or a pH of 11,5 or greater.

Justification for classification or non-classification

According to the CLP Regulation (EC n. 1272/2008) and based on the low pH of TBHS 55% solution in water, the classification H314 (Causes severe skin burns and eye damage) is proposed for tetrabutylammonium hydrogen sulphate.