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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Partition coefficient

Currently viewing:

Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data from handbook or collection of data Adopted according to HSDB (Peer reviewed data base)

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Exploring QSAR. Hydrophobic, Electronic, and Steric Constants.
Author:
Hansch C, Leo A and Hoekmann D
Year:
1995
Bibliographic source:
ACS Professional Refernce Book. Amaerican Chemical Society, Washington, DC, p. 32
Reference Type:
review article or handbook
Title:
4-Aminotoluene
Author:
HSDB
Year:
2009
Bibliographic source:
National Library of Medicine (NLM)

Materials and methods

Principles of method if other than guideline:
secondary peer reviewed source, valid collection of data
GLP compliance:
not specified
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
p-toluidine
EC Number:
203-403-1
EC Name:
p-toluidine
Cas Number:
106-49-0
Molecular formula:
C7H9N
IUPAC Name:
4-methylaniline
Details on test material:
- Name of test material (as cited in study report): p-Toluidine
- Analytical purity: not specified

Results and discussion

Partition coefficientopen allclose all
Type:
log Pow
Partition coefficient:
1.44
pH:
7.4
Type:
log Pow
Partition coefficient:
1.39
Type:
log Pow
Partition coefficient:
1.39
pH:
7.5

Any other information on results incl. tables

Temperature was not specified.

Three values were given: 1.39, 1.39, and 1.44 from 3 different sources. 
log Pow 1.44 was signed as preferred value.
log Pow 1.39 was signed as preferred value for the neutral form (this value is cited in HSDB).

Applicant's summary and conclusion

Executive summary:

Hansch C, 1995

The measured logPow of p-toluidine is 1.39.