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Environmental fate & pathways

Adsorption / desorption

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Endpoint:
adsorption / desorption: screening
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 low octanol water partition coefficient and the adsorption potential of this substance is related to this parameter
Endpoint:
adsorption / desorption
Type of information:
calculation (if not (Q)SAR)
Remarks:
calculation of log Koc for ionized molecule
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
GLP compliance:
no
Specific details on test material used for the study:
No further test item information available
Type:
Koc
Value:
57.4
pH:
5
Type:
log Koc
Value:
1.76
pH:
5
Type:
Koc
Value:
57.4
pH:
7
Type:
log Koc
Value:
1.76
pH:
7
Validity criteria fulfilled:
not specified
Conclusions:
The Koc of the substance was calculated following Franco & Trapp (2008) to be 57.4 (logKoc = 1.76) at pH 5 and 7.

Description of key information

Following the low octanol water partition coefficient (log Pow = 0.0931) of the substance, no significant adsorption is expected. The Koc was calculated to be 57.4 L/kg  (logKoc = 1.76) following Franco & Trapp (2008).

Key value for chemical safety assessment

Koc at 20 °C:
57.4

Additional information

Based on the relatively low logPow no significant adsorption to soil or sediment is expected. For any further assessment, a log Koc of 1.76 (pH 5 and 7) for the ionized molecule was calculated according to Franco & Trapp (2008) using a pKa of 10.2 and a log Pow of 0.0931 (uncharged molecule) as input-parameter.

[LogKoc: 1.76]