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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
2010-01-19
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
Version / remarks:
Titration method
GLP compliance:
no
Specific details on test material used for the study:
- Analytical purity: > 98% GC purity
- Lot/batch No.: 581017
- Storage condition of test material: room temperature
Dissociating properties:
yes
No.:
#1
pKa:
4.68
Temp.:
20 °C
Conclusions:
the pKa of Bis-MPA is 4.68 at 20°C.
Executive summary:

In a study according to OECD 112 the pKa of Bis-MPA was determined as 4.68 at 20°C.

Description of key information

In a study according to OECD 112 the pKa of Bis-MPA was determined as 4.68 at 20°C.

Key value for chemical safety assessment

pKa at 20°C:
4.68

Additional information