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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Deviations:
yes
Remarks:
one sample per concentration only; octanol:water no variation in volumes tested. Analytics is not substance specific (only titration of acid). Report does not conform with guideline.
GLP compliance:
no
Type of method:
flask method
Partition coefficient type:
octanol-water
Analytical method:
titration method
Type:
Pow
Partition coefficient:
3
Temp.:
23 °C
pH:
> 0 - < 0.5
Remarks on result:
other: starting concentration between 0.5 and 1 mol/L
Key result
Type:
Pow
Partition coefficient:
0.46
Temp.:
23 °C
pH:
1.7
Remarks on result:
other: concentration of aqueous phase before shaking = 0.01 mol/L

Konzentration

Verteilungskoeffizent

Stammlösung

organische Phase

wässrige Phase

 

mol/l

mol/l

mol/l

Kow

0,987

0,676

0,2245

3,01

0,50

0,330

0,110

3,00

0,749

0,480

0,160

3,00

 

 

Æ

3,0

Conclusions:
The log Kow of PFBS was dermined with shake flask method to be -0.34 at 23°C and pH of 1.7

Description of key information

The logKow of PFBS was determined as -0.34 in a 0.01 mol/L concentration (pH 1.7) at 23°C.

Key value for chemical safety assessment

Log Kow (Log Pow):
-0.34
at the temperature of:
23 °C

Additional information