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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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)

Referenceopen allclose all

Endpoint:
partition coefficient
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance has a high surface activity
Reason / purpose for cross-reference:
data waiving: supporting information
Reason / purpose for cross-reference:
data waiving: supporting information
Endpoint:
partition coefficient
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
Verschueren (1983) reports that octanol-water partition coefficients can be estimated for a wide range of substances as follows:
 
Log Kow= 4.5 – 0.75 Log S                                             
Where S = water solubility in mg/L
Guideline:
other:
Version / remarks:
Verschueren (1983) calculation method
Principles of method if other than guideline:
Verschueren, K., 1983. Relationship between aqueous solubility and octanol/water partition coefficient. In: K. Verschueren, ed. Handbook of Environmental Data on Organic Chemicals. New York: Van Nostrand Reinhold Company Inc., pp. 24-27.
GLP compliance:
no
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water
Type:
log Pow
Partition coefficient:
< 0.3
Temp.:
25 °C
pH:
ca. 7
Remarks on result:
other: calculated value
Conclusions:
It is not possible to measure the Log Kow as the substance is surface active. The Log Kow has been calculated based on the water solubility of >40% in water as Log Kow <0.30.

Description of key information

The study does not need to be conducted because the substance has a high surface activity. The calculated value based on the water solubility of > 40% is Log Kow < 0.30.

Key value for chemical safety assessment

Log Kow (Log Pow):
0.3

Additional information