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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 205-391-3 | CAS number: 140-01-2
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Key study is available for DTPA Acid (CAS# 67-43-6)
Key value for chemical safety assessment
Additional information
Key study is available for DTPA Acid (CAS# 67-43-6) however the dissociation constants (pKa) are the same for DTPA, regardless of acid or salt form (Pentasodium DTPA 88% purity). 5 pKa values are available: pK1: 1.79; pK2: 2.56; pK3: 4.42; pK4: 8.76 and pK5: 10.42. All conducted at 20 degrees Celcius
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.
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