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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Dissociation constant

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Description of key information

Determination of the Dissociation Constant of FAT 40858/A TE  in Water 

Key value for chemical safety assessment

Additional information

The pKavalues were calculated at the half-neutralization point. Three pKavalues were determined by titration withSodium hydroxide solution. The titrations were performed with different concentration of sodium hydroxide to determine all pKavalues.

 

pKa1= 4.413 (titration with 0.01 M NaOH) at 20 ± 0.4 °C

pKa2= 6.948 (titration with 0.01 and 0.1 M NaOH) at 20 ± 0.5 °C

pKa3= 9.972 (titration with 0.1 M NaOH) at 20 ± 0.5 °C