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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
The tests was be performed and reported in compliance with the principles of Good Laboratory Practice (GLP) in accordance with the currently valid German Chemical Substance Act (Chemikaliengesetz - ChemG), the underlying Commission Directive 2004/1 O/EC of 1 1 February 2004 and the relevant OECD decision of the council on 26 November 1 997. The results reproduce the complete course of the study

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
according to guideline
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
GLP compliance:
yes (incl. QA statement)
Type of method:
HPLC method
Partition coefficient type:

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction mass of 2-methyldecan-1-al and undecanal
EC Number:
Molecular formula:
not applicable-Multi constituent
Reaction mass of 2-methyldecan-1-al and undecanal
Details on test material:
Batch no./ LIMS no. 20121206105539
Origin Tank 23 from 08 Auqust 2012
Storaqe cool; at room temperature; tiqhtly closed; dry; handle under N2

Purity 97.94 % sum n/i-Undecanal

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficient
log Pow
Partition coefficient:
>= 5 - <= 5.2
25 °C
Remarks on result:
other: no dimension for log Pow

Applicant's summary and conclusion

Partition coefficient n-octanol / water (Kow) at 25 °C: Kow = 1.0 x 10^5 - 1.58 x 10^5
log Kow = 5.0 - 5. 2
Executive summary:

The partition coefficient n-octanol / water (Kow) of the test item was determined according to OECD guideline no. 117 [adopted on 13 April 2004] and EU test method A.8 [Council Regulation (EC) No 440/2008 of 30 May 2008] with the HPLC method. Partition coefficient n-octanol / water (Kow) at 25 °C: Kow = 1.0 x 10^5 - 1.58 x 10^5

log Kow = 5.0 - 5. 2