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Physical & Chemical properties

Dissociation constant

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Reference
Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Information contained in an authoritative, standard reference work in industrial chemistry. The authors were employed at the Amoco Chemical Company, with direct access to company data/information relevant to the commercial production of terephthalic acid.
Reason / purpose:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Procedure not stated.
GLP compliance:
not specified
Dissociating properties:
yes
No.:
#1
pKa:
3.54
Temp.:
25 °C
Remarks on result:
other: In aqueous solution
No.:
#2
pKa:
4.46
Temp.:
25 °C
Remarks on result:
other: In aqueous solution
Conclusions:
The pK1 and pK2 values for terephthalic acid in aqueous solution at 25 degrees C are 3.54 and 4.46, respectively.

Description of key information

The pK1 and pK2 values for terephthalic acid in aqueous solution at 25 degrees C are 3.54 and 4.46, respectively. 

Key value for chemical safety assessment

Additional information