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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Endpoint:
dissociation constant
Type of information:
other: review
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: summary of public domain data

Data source

Reference
Reference Type:
review article or handbook
Title:
Sulphuric acid CAS No 7664-93-9 SIDS Initial Assessment Report 11th SIAM
Author:
OECD
Year:
2001
Bibliographic source:
UNEP publications

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Sulphuric acid
EC Number:
231-639-5
EC Name:
Sulphuric acid
Cas Number:
7664-93-9
Molecular formula:
H2O4S
IUPAC Name:
Sulfuric acid
Details on test material:
sulphuric acid, no further details

Results and discussion

Dissociating properties:
yes
Dissociation constant
No.:
#1
pKa:
1.92

Any other information on results incl. tables

see above

Applicant's summary and conclusion

Conclusions:
pKa= 1.92 fro sulphuric acid
Executive summary:

pKa= 1.92 for sulphuric acid