Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
4-chlorobenzoylchloride hydrolyses in aqueous solutoin. Therefore partition coefficient is calculated for product of hydrolysis.
Substance is in the range of the model, it is used in the training set.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2020

Materials and methods

Test guideline
Qualifier:
no guideline required
Principles of method if other than guideline:
Episuite KowWin
Type of method:
calculation method (fragments)
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
4-chlorobenzoic acid
EC Number:
200-805-9
EC Name:
4-chlorobenzoic acid
Cas Number:
74-11-3
Molecular formula:
C7H5ClO2
IUPAC Name:
4-chlorobenzoic acid

Results and discussion

Partition coefficient
Type:
log Pow
Partition coefficient:
ca. 2.52
Temp.:
25 °C
Remarks on result:
other: QSAR calculation

Any other information on results incl. tables


Log Kow(version 1.69 estimate): 2.52

Experimental Database Structure Match:
Name : 4-CHLOROBENZOIC ACID
CAS Num : 000074-11-3
Exp Log P: 2.65
Exp Ref : HANSCH,C ET AL. (1995)

SMILES : O=C(O)c1ccc(CL)cc1
CHEM :
MOL FOR: C7 H5 CL1 O2
MOL WT : 156.57
-------+-----+--------------------------------------------+---------+--------
TYPE | NUM | LOGKOW FRAGMENT DESCRIPTION | COEFF | VALUE
-------+-----+--------------------------------------------+---------+--------
Frag | 6 | Aromatic Carbon | 0.2940 | 1.7640
Frag | 1 | -CL [chlorine, aromatic attach] | 0.6445 | 0.6445
Frag | 1 | -COOH [acid, aromatic attach] |-0.1186 | -0.1186
Const | | Equation Constant | | 0.2290
-------+-----+--------------------------------------------+---------+--------
Log Kow = 2.5189

Applicant's summary and conclusion

Conclusions:
Calculated Log Pow ist 2.52