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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:
October 17, 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
no
GLP compliance:
no
Type of method:
flask method
Partition coefficient type:
octanol-water
Analytical method:
photometric method
Type:
Pow
Partition coefficient:
ca. 0.004
Temp.:
20 °C
pH:
ca. 6.86
Type:
log Pow
Partition coefficient:
ca. -2.375
Temp.:
20 °C
pH:
ca. 6.86

At 96 hours values reached equilibrium, and so this value was considered for final calculations making duplicate determinations of every ratio o/w. Concentration of mother solution: W1 = 0.0406 g / 100ml = 0.4060 g/l

Conclusions:
Log Pow = -2.3749 at 20 °C and pH = 6.86
Executive summary:

Method

Partition coefficient was determined by means of shake flask method as per recommendations of OECD 107. Partition coefficient (P) is defined as the ratio of the equilibrium concentrations of a dissolved substance in a two-phase system consisting in two largely immiscible solvents.

Result

Study conducted at 20 °C and at pH of 6.86.

Log Pow = -2.3749.

Description of key information

-2.3749  (Pow: 0.0044) at 20 °C and pH 6.86 

Key value for chemical safety assessment

Log Kow (Log Pow):
-2.375
at the temperature of:
20 °C

Additional information

Shake Flask method - OECD guideline 107