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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

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
Guideline:
other: no information available, secondary literature
Principles of method if other than guideline:
Data from a secondary literature, this value in reported from the handbook Serjeant EP, Dempsey B 1979, no information is available on the QSAR method.
GLP compliance:
not specified
Dissociating properties:
not determined
pKa:
4.58
Temp.:
25 °C
Remarks on result:
other: no other infomation available
Conclusions:
pKa = 4.58
Executive summary:

According to the peer reviewed litterature pKa = 4.58 at 25°C, data form the handbook Serjeant EP, Dempsey B; Ionisation constants of organic acids in aqueous solution. IUPAC Chem Data Ser No.23. NY,NY: Pergamon pp. 989 (1979).

Description of key information

According to the peer reviewed secondary litterature pKa = 4.58, data from the handbook Serjeant EP, Dempsey B; Ionisation constants of organic acids in aqueous solution. IUPAC Chem Data Ser No.23. NY,NY: Pergamon pp. 989 (1979).

Key value for chemical safety assessment

pKa at 20°C:
4.58

Additional information