Registration Dossier
Registration Dossier
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EC number: 204-171-4 | CAS number: 117-08-8
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Tetrachlorophthalic anhydride hydrolysis in water forming tetrachlorophthalic acid (CAS 632-58-6). The dissociation constant for the hydrolysis product is estimated to be pKa 1 of 3.01 and pKa 2 of 0.55.
Key value for chemical safety assessment
- pKa at 20°C:
- 3.01
Additional information
For the hydrolysis product tetrachlorophthalic acid (CAS 632-58-6) the estimated pka1 is 3.01 and pKa2 is 0.55 using the ACD 7.0 software, indicating that the substance exists predominately in its dissociated form at environmentally relevant pH.
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