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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
not specified
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Guideline:
other: not specified
Version / remarks:
Standard laboratory method is assumed
GLP compliance:
not specified
Dissociating properties:
not determined
pKa:
4.66
Remarks on result:
other: room temperature

Temperature: unspecified, but room temperature ca. 25 °C is assumed

Conclusions:
A reliable handbook value of pKa =4.66 is available.
Executive summary:

The dissocitation constant of methacrylic acid is reported in a reliable handbook with pKa =4.66.

Description of key information

The dissocitation constant of methacrylic acid is reported in a reliable handbook with pKa =4.66.

Key value for chemical safety assessment

Additional information