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Physical & Chemical properties

Partition coefficient

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Administrative data

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
April 10th, 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
GLP compliance:
no
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water
Analytical method:
photometric method
Type:
Pow
Partition coefficient:
ca. 58.615
Temp.:
20 °C
Remarks on result:
other: pH n.a.
Type:
log Pow
Partition coefficient:
ca. 1.766
Temp.:
20 °C
Remarks on result:
other: pH n.a.

At 96 hours, values reached equilibrium, and so this value was considered for final calculations making duplicate determinations of every o/w ratio.

Concentration of mother solution: W1= 0.0413 g/100 ml = 0.4130 g/l.

Ratio o/w

Water phase

c (g/l)

n-octanol phase

c (g/l)

Pow

log Pow

Average log Pow

70/30

0.0062

0.3986

64.3611

1.808624

1.7578

0.0078

0.3986

50.9231

1.706915

50/50

0.0078

0.4052

51.7692

1.714072

1.7510

0.0066

0.4064

61.3636

1.787311

30/70

0.0063

0.4103

64.9048

1.812277

1.7892

0.0070

0.4100

58.3714

1.766200

pH of the test solution:

n.a.

Average Pow

58.6155

Average log Pow

1.7660

Std. dev. Pow

2.6723

Std. dev. log Pow

0.020

Conclusions:
The partition coefficient, log Pow, of the test substance is 1.7660, at 20 °C.
Executive summary:

The partition coefficient of the substance was tested according to the OECD guideline 107 (Partition coefficient (n-octanol/water): Shake Flask Method).

The partition coefficient, log Pow, of the test substance is 1.7660 at 20 °C.

Description of key information

1.7660

Key value for chemical safety assessment

Log Kow (Log Pow):
1.766
at the temperature of:
20 °C

Additional information

The partition coefficient (log Pow) of the test substance is 1.7660 at 20 °C as determined according to OECD guideline 107: Shake flask method.