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Physical & Chemical properties

Partition coefficient

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partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental starting date 06 February 2017; Experimental completion date 03 April 2017
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Version / remarks:
May 31, 2008
according to guideline
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Version / remarks:
July 27, 1995
according to guideline
EPA OPPTS 830.7550 (Partition Coefficient, n-octanol / H2O, Shake Flask Method)
Version / remarks:
August, 1996
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Partition coefficient type:
Specific details on test material used for the study:
Test item 207569/B
Identification Quaternium-26
Appearance Clear amber to dark amber liquid
Batch 0001954899
Composition UVCB
Storage At room temperature
Stable under storage conditions until 22 December 2017 (retest date)
Analytical method:
other: Since the test item is surface active, the partition coefficient was calculated using the critical micelle concentration and the n-octanol solubility.
Key result
log Pow
Partition coefficient:
>= 3.4
20 °C
Remarks on result:
other: pH not measured.
Details on results:
After the stirring period, the solution of the test sample in n-octanol was clear lacking undissolved test item. Hence, it was concluded that the n-octanol solubility of at 20°C was ≥ 1016 g/L. The critical micelle concentration was determined to be 0.407 g/L. As a result, the Pow, calculated as the quotient of the n-octanol- and CMC, is ≥ 2.5e3 corresponding with a log Pow value of ≥ 3.4.
The estimation method was applied for the determination of the partition coefficient (Pow) of Quaternium-26. The Pow value of the test item at 20°C was ≥ 2500 corresponding with a log Pow value of ≥ 3.4.

Description of key information

Based on a guideline study performed under GLP.

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
20 °C

Additional information