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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Benzenesulfonic acid, para-, monoalkylation products with C14-C18 branched olefins (C15 rich) derived from propene oligomerization, calcium salt, overbased including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalytic dewaxed, light or heavy paraffinic C15-C50
EC Number:
701-205-4
Molecular formula:
H(66-82)C(40-48)O6S2Ca
IUPAC Name:
Benzenesulfonic acid, para-, monoalkylation products with C14-C18 branched olefins (C15 rich) derived from propene oligomerization, calcium salt, overbased including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalytic dewaxed, light or heavy paraffinic C15-C50
Details on test material:
- EC# 701-205-4
- Expiration date: December 31, 2011

Results and discussion

Dissociating properties:
no
Dissociation constantopen allclose all
No.:
#1
pKa:
> 9.2 - < 9.5
Temp.:
25 °C
No.:
#2
pKa:
> 9.2 - < 9.5
Temp.:
25 °C

Applicant's summary and conclusion

Conclusions:
The calculated Pkb 1 value using this solvent system is 9.8 (duplicate is 9.5) and Pkb 2 value using this solvent system is 9.2 (duplicate is 9.2).