Registration Dossier

Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Follows a recognised guideline and performed to GLP standards.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.8 (Partition Coefficient)
GLP compliance:
yes (incl. certificate)
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficientopen allclose all
Type:
Pow
Partition coefficient:
0
Temp.:
22.2 °C
pH:
ca. 7
Type:
log Pow
Partition coefficient:
-4.23
Temp.:
22.2 °C
pH:
ca. 7
Details on results:
Preliminary test - Approximate solubility in n-octanol: <1.04 g/l; Approximate solubility in water: >1.26 g/l; Approximate Pow: <0.85; Log Pow: <-8.33E-2.
Definitve test - see tables below.

Any other information on results incl. tables

Total weight and analysed concentration of the respective phases:

Sample number Volume of water saturated n-octanol (ml) Volume of stock solution (ml) Total weight (mg)# Organic phase Aqueous phase
Analysed concentration (mg/l) Weight (mg)* Analysed concentration (mg/l) Weight (mg)* pH
1 375 15 73.4 0.328 0.123 5.03E+03 75.5 7.2
2 375 15 73.4 0.357 0.134 5.68E+03 85.3 7.1
3 325 26 127 0.282 0.0916 5.02E+03 131 7.1
4 325 26 127 0.255 0.0829 5.05E+03 131 7.1
5 275 44 215 0.367 0.101 4.95E+03 218 7.1
6 375 60 293 0.24 0.0899 5.04E+03 303 7.1

# From the analysis of the stock solution.

* From the analysis of the respective phase.

Partition coefficient determined for each sample:

Sample number n-Octanol/water volume ratio Partition coefficient Log10 Pow Mean Partition Coefficient
1 25.1 6.51E-05 -4.19 6.40E-05
2 6.29E-05 -4.20
3 25.2 5.61E-05 -4.25 5.33E-05
4 5.05E-05 -4.30
5 25.4 7.42E-05 -4.13 6.09E-05
6 4.76E-05 -4.32

Applicant's summary and conclusion

Conclusions:
The partition coefficient of trisodium 6,6',6"-(1,3,5-triazine-2,4,6-triyltriimino)trihexanoate has been determined to be 5.94E-5 at 22.2 +/- 0.5 C, log Pow -4.23.