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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Remarks:
Test procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer)
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: ETAD Analytical Expert Group
Version / remarks:
method for substances with very low solubility in both, water and n-octanol
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water
Analytical method:
photometric method
Type:
Pow
Partition coefficient:
69.3
Temp.:
24 °C
pH:
ca. 7
Type:
log Pow
Partition coefficient:
1.84
Temp.:
24 °C
pH:
ca. 7

The octanol and the water solubility were both determined at 24-25 °C.

It is not possible to enter a temperature range in the field above, therefore 24 °C was taken as the temperature value.

Calculation:

log Kow = logP = log (c(n-octanol)/c(water))

(c: individual solubilities; see below).

 

PO62

Octanol solubility [µg/L]

790

Water solubility [µg/L]

11.4

POW

 69.3

log POW

 1.84

Description of key information

Key value for chemical safety assessment

Log Kow (Log Pow):
1.84
at the temperature of:
24 °C

Additional information