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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption: screening
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Study period:
2014-05-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Qualifier:
no guideline followed
Principles of method if other than guideline:
Calculation with EUSES
GLP compliance:
no
Type of method:
other: estimated by calculation
Media:
other: estimated by calculation
Radiolabelling:
no
Test temperature:
not feasible (estimated by calculation)
Details on study design: HPLC method:
not feasible (estimated by calculation)
Analytical monitoring:
no
Details on sampling:
not feasible (estimated by calculation)
Details on matrix:
not feasible (estimated by calculation)
Details on test conditions:
not feasible (estimated by calculation)
Computational methods:
not feasible (estimated by calculation)
Key result
Type:
Koc
Value:
3 240 L/kg
Remarks on result:
other: Kow method (Sabljic and Güsten, 1995)
Key result
Type:
log Koc
Value:
3.51 dimensionless
Remarks on result:
other: Kow method (Sabljic and Güsten, 1995)
Details on results (HPLC method):
not feasible (estimated by calculation)
Adsorption and desorption constants:
not feasible (estimated by calculation)
Recovery of test material:
not feasible (estimated by calculation)
Concentration of test substance at end of adsorption equilibration period:
not feasible (estimated by calculation)
Concentration of test substance at end of desorption equilibration period:
not feasible (estimated by calculation)
Details on results (Batch equilibrium method):
not feasible (estimated by calculation)
Statistics:
not feasible (estimated by calculation)

not feasible (estimated by calculation)

Validity criteria fulfilled:
yes
Conclusions:
As tert.-Butylperoxy-2-ethylhexanoat is not stable under the conditions of a Koc test and due to its low water solubility, the log Koc value of tert.-Butylperoxy-2-ethylhexanoat was calculated using EUSES (v. 2.1). For tert.-Butylperoxy-2-ethylhexanoat the log Koc was estimated to be 3.5105, the respective Koc to be 3240 L/kg using Kow method (Sabljic and Güsten, 1995).
Executive summary:

The test method for determination of the adsorption coefficient (Koc) of a substance as described for liquid materials in Test Guideline C.19 of EC Regulation 440/2008 was replaced by a model calculation as is not stable under the conditions of a Koc test and due to its low water solubility. The log Koc value of tert. Butylperoxy-2-ethylhexanoat (TBPEH) was calculated using EUSES (v. 2.1). For tert.-Butylperoxy-2-ethylhexanoat the log Koc was estimated to be 3.5105, the respective Koc to be 3240 L/kg using Kow method (Sabljic and Güsten, 1995).

Description of key information

As tert.-Butylperoxy-2-ethylhexanoat is not stable under the conditions of a Koc test and due to its low water solubility, the log Koc value of tert.-Butylperoxy-2-ethylhexanoat was calculated using EUSES (v. 2.1). For tert.-Butylperoxy-2-ethylhexanoat the log Koc was estimated to be 3.5105, the respective Koc to be 3240 L/kg using Kow method (Sabljic and Güsten, 1995).

Key value for chemical safety assessment

Additional information

The test method for determination of the adsorption coefficient (Koc) of a substance as described for liquid materials in Test Guideline C.19 of EC Regulation 440/2008 was replaced by a model calculation as is not stable under the conditions of a Koc test and due to its low water solubility. The log Koc value of tert. Butylperoxy-2-ethylhexanoat (TBPEH) was calculated using EUSES (v. 2.1). For tert.-Butylperoxy-2-ethylhexanoat the log Koc was estimated to be 3.5105, the respective Koc to be 3240 L/kg using Kow method (Sabljic and Güsten, 1995).