Registration Dossier

Physical & Chemical properties

Dissociation constant

Currently viewing:

Administrative data

Endpoint:
dissociation constant
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, no restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 112 (Dissociation Constants in Water)
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Test Substance Name Hydrogenated Rosin
CAS No. 65997-06-0
Supplied By Eastman Chemicals
Description Light amber pellets.

Results and discussion

Dissociating properties:
yes
Dissosciation constant
pKa:
6.73
Temp.:
20 °C

Any other information on results incl. tables

Full test results:

0.00 13.20 
 4.00 13.07 
 8.00 12.86 
 12.00 12.57 
 16.00 12.00 
 18.00 10.68 
 19.00 9.00 
 19.50 7.55 
 19.60 7.21 
 19.70 6.73 
 19.80 6.35 
 19.90 5.73 
 20.00 4.80 
 21.00 2.42 
 22.00 2.08 

Applicant's summary and conclusion

Conclusions:
The following dissociation constants in water result was obtained: pKa = 6.73± 1.0
Executive summary:

Dissociation constant in water for Hydrogenated Rosin was measured in accordance to OECD 112 guideline and a pKa value of 6.73± 1.0 was determined.