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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07 March 2007 to 15 March 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
HPLC method
Partition coefficient type:
octanol-water
Analytical method:
high-performance liquid chromatography
Key result
Type:
log Pow
Partition coefficient:
0.76
Remarks on result:
other: Temperature & pH not reported
Details on results:
Three peaks were detected with UV and one with RI. Table 1 gives the individual retention times for each component and the calculated log n-octanol/water partition coefficient, relative to the reference compounds.

Table 1: Log Pow values for the test item

Sample

Detector

Retention time (mins)

Peak area (%)

Log Pow

Run 1

Run 2

Run 1

Run 2

Run 1

Run 2

Peak 1

UV

2.758

2.76

0.76

0.78

-2.57

-2.55

RI

-

-

-

-

-

-

Peak 2

UV

3.207

3.193

0.47

0.52

-0.43

-0.47

RI

-

-

-

-

-

-

Peak 3

UV

3.779

3.776

98.77

98.70

0.61

0.61

RI

3.898

3.889

100.0

100.0

0.76

0.75

Conclusions:
These results show all peaks have log Pow values less than 3.0 and are consistent with a material that has little tendency to accumulate in the environment. The log Pow of hexahydro-1,3,5-trimethyl-1,3,5-triazine was 0.76 and the log Pow of the impurities ranged from -2.57 to -0.47.
Executive summary:

Substances under test: Hexahydro-1,3,5 -trimethyl-1,3,5 -triazine

Chemex reference: Sample - ECO020727. Study - ENV8008

Test type: Partition coefficient (n-octanol/ water) by HPLC

Test conditions: Partition coefficient (n-octanol/ water) according to OECD Guidelines for the Testing of Chemicals reference 117.

Test dates: 07 March 2007 - 15 March 2007

Test carried out at:

Chemex Environmental International Limited

Unit J

Broad Lane Industrial Estate

Cottenham

Cambridge

CB24 8SW

England

Results:

Sample

Detector

Peak area (%)

Log Pow

Run 1

Run 2

Run 1

Run 2

Peak 1

UV

0.76

0.78

-2.57

-2.55

RI

-

-

-

-

Peak 2

UV

0.47

0.52

-0.43

-0.47

RI

-

-

-

-

Peak 3

UV

98.77

98.70

0.61

0.61

RI

100.0

100.0

0.76

0.75

Three peaks were detected with UV and one with RI. These results show all peaks have log Pow values less than 3.0 and are consistent with a material that has little tendency to accumulate in the environment. The log Pow of hexahydro-1,3,5-trimethyl-1,3,5-triazine was 0.76 and the log Pow of the impurities ranged from -2.57 to -0.47.

Description of key information

Log Pow = 0.76, OECD 117, Staniland (2007)

Key value for chemical safety assessment

Log Kow (Log Pow):
0.76

Additional information

A single key study was submitted for this endpoint, conducted in accordance with OECD Guideline 117. The n-octanol/water partition coefficient (Kow) was determined to be 5.75 (log Kow = 0.76) (Staniland 2007).