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Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09/08-11/08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
no
GLP compliance:
no
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
1,3-dihydroxyacetone
EC Number:
202-494-5
EC Name:
1,3-dihydroxyacetone
Cas Number:
96-26-4
Molecular formula:
C3H6O3
IUPAC Name:
1,3-dihydroxyacetone
Details on test material:
Purity: 100.2 %

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficient
Type:
log Pow
Partition coefficient:
-1.95
Temp.:
20 °C
Remarks on result:
not measured/tested
Remarks:
pH was not measured

Any other information on results incl. tables

According to the preliminary test the solubility of the test item in n-octanol is between 1.52 g/l and 5.33 g/l.The partition coefficient POW was estimated from the saturation concentrations in n-octanol and water. The saturation concentration of the test item in water was given by the main test of project 20080630.01 (please refer to 4.8): at 20°C the water solubility cS was determined to (without correction of the purity): cSwater = 930 g/l. The n-octanol solubility cSoctanol of the test item at a temperature of 20°C was determined to (without correction of the purity): cSoctanol = 10.5 g/l

From the individual solubilities the log POW can be calculated:

POW= 10.5 g/l / 930 g/l

POW= 0.01129

log POW  =  - 1.95

A standard solution was analysed one day after preparation and showed a recovery value of 97.9 %. This observation indicates a good stability of the test item over this time period.

Applicant's summary and conclusion

Conclusions:
The partition coefficient n-octanol/water of the test item at 20 °C, performed according to the flask method (individual solubilities in water and n-octanol), was determined to: log POW = - 1.95
Executive summary:

The partition coefficient of DHA in n-octanol and water was determined according to OECD 107. Considering the maximum solubilities in n-octanol and water the log POW is -1.95.

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