Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: - | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
At pH 1 conditions, less than <1% 1.4-benzene dicarboxylic acid is ionized calculated according to the equation of Henderson-Hasselbalch.
The diamines, 1.6-hexane-diamine and 1.4-butane diamine will be 100% ionized at pH 1 and present as the cations 1, 4- butanediammonium, and 1,6-hexanediammonium.
At pH 4 and 5 conditions, the 1.4-benzene dicarboxylic acid will 100% ionized.
The diamines, 1.6-hexane-diamine and 1.4-butane diamine will be 100% ionized and present at pH 4 and 5 as the cations 1, 4- butanediammonium, and 1,6-hexanediammonium.
At pH 7 conditions, the 1.4-benzene dicarboxylic acid will be 100% ionized. The diamines, 1.6-hexane-diamine and 1.4-butane diamine will also 100% ionized.
At pH 9 and 10 conditions, the 1.4-benzene dicarboxylic acid will be 100% ionized. The diamines, 1.6-hexane-diamine and 1.4-butane diamine will also 100% ionized.
According to the calculations, only at pH 13 and higher the diamines, 1.6-hexane-diamine and 1.4-butane diamine will less than 1% ionized
Key value for chemical safety assessment
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
