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Physical & Chemical properties

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:
other: the solubilty of UVCB is the limiting factor for the logPow determination
Qualifier:
according to guideline
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
GLP compliance:
not specified
Type of method:
HPLC method
Partition coefficient type:
octanol-water
Key result
Type:
log Pow
Partition coefficient:
< 1.9
Remarks on result:
other: < 5 % of the UVCB test item, mainly associated to disulfonated carbonic acids
Key result
Type:
log Pow
Partition coefficient:
>= 1.9 - <= 5.1
Remarks on result:
other: aprox. 25% of the UVCB test item, associated to sulfoacids of carbonic acids and dibutylamides
Key result
Type:
log Pow
Partition coefficient:
> 5.1
Remarks on result:
other: 10-15% of the UVCB test item, associated to carbonic acids and dibutylamides
Conclusions:
Below 5 % of the test item has a log Pow < 1.9 (disulfonated carbonic acids), approximately 25 % has a log Pow between >= 1.9 and <= 5.1 (sulfoacids of carbonic acids and dibutylamides) and 10-15 % has a log Pow >= 5.1 (carbonic acids and dibutylamides)
Executive summary:

A study was conducting according to OECD test guideline 117 to determine the logPow of the test item. Therefore, the HPLC method was used.

The logPow of < 5 % of the UVCB test item, mainly associated to disulfonated carbonic acids is < 1.9.

The logPow of aprox. 25% of the UVCB test item, associated to sulfoacids of carbonic acids and dibutylamides is >= 1.9 <= 5.1

The logPow of 10-15% of the UVCB test item, associated to carbonic acids and dibutylamides is > 5.1.

The estimated key value (log Pow 2.99) for chemical safety assessment is based on combination of worst case assumption of water/n-octanol solubilities and HPLC-chromatogramm of the the target substance of the UVCB (N,N-dibuty(sulphonatooxy)octadecanamidate and sodium sulphooctadecanoate) according oecd test guideline 117.

Description of key information

The estimated logPow is 2.99 based on combination of worst case assumption of water/n-octanol solubilities and HPLC-chromatogramm of the the target substance of the UVCB ( N,N-dibuty(sulphonatooxy)octadecanamidate and sodium sulphooctadecanoate) according oecd test guideline 117.

Key value for chemical safety assessment

Log Kow (Log Pow):
2.99

Additional information

A study was conducting according to OECD test guideline 117 to determine the logPow of the test item. Therefore, the HPLC method was used.

The logPow of < 5 % of the UVCB test item, mainly associated to disulfonated carbonic acids is < 1.9.

The logPow of aprox. 25% of the UVCB test item, associated to sulfoacids of carbonic acids and dibutylamides is >= 1.9 <= 5.1

The logPow of 10-15% of the UVCB test item, associated to carbonic acids and dibutylamides is > 5.1.

The estimated key value (log Pow 2.99) for chemical safety assessment is based on combination of worst case assumption of water/n-octanol solubilities and HPLC-chromatogramm of the the target substance of the UVCB (N,N-dibuty(sulphonatooxy)octadecanamidate and sodium sulphooctadecanoate) according oecd test guideline 117.