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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
Remarks:
other: calculation of log Koc for ionized molecule
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
GLP compliance:
no
Type:
Koc
Value:
26
Remarks on result:
other: pH 5.0
Type:
log Koc
Value:
1.41
Remarks on result:
other: pH 5.0
Type:
Koc
Value:
26
Remarks on result:
other: pH 7.0
Type:
log Koc
Value:
1.41
Remarks on result:
other: pH 7.0
Validity criteria fulfilled:
not specified
Conclusions:
The Koc of the substance was calculated following Franco & Trapp (2008) to be 26.0 (logKoc = 1.41) at pH 5 and 7.

Description of key information

Following the low octanol water partition coefficient (log Pow = -0.50) of the substance, no significant adsorption is expected. The Koc was calculated to be 26.0 L/kg  (log Koc = 1.41) following Franco & Trapp (2008).

Key value for chemical safety assessment

Koc at 20 °C:
26

Additional information

Based on the relatively low log Pow no significant adsorption to soil or sediment is expected. For any further assessment, a log Koc of 1.41 (pH 5 and 7) for the ionized molecule was calculated according to Franco & Trapp (2008) using a pKa of 10.4 and a log Pow of -0.50 (uncharged molecule) as input-parameter.