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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information


The hydrolysis of BF4− occurs stepwise to BF3OH−, BF2(OH)2− , and BF(OH)3− and ultimately B(OH)4− accompanied with the formation of hydrofluoric acid . Due to the strong affinity of boron for fluoride, complete hydrolysis of BF4- occurs at low concentrations, yet with a slow initial step, especially at normal temperature and at a neutral or alkaline pH.


The concept of biodegradation does not apply to inorganic substances.


Given its ionic nature, tetrafluoroboric acid is expected to partition favourably to water rather than organic and fatty media.


No significant sorption behaviour is to be expected for potassium tetrafluoroborate or its dissociated/hydrolysed anions.