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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption
Remarks:
other: Calculated
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: TGD guideline QSAR calculations, acceptable with restrictions
Principles of method if other than guideline:
According to Sabljic and Gusten (1995) as recommended in Part 2 Section 2.3 of the TGD (2003) for hydrophobic compounds. Koc is calculated as log Koc = 0.81log Kow + 0.1. Based on a measured log Kow of 3.42 for 1,3,5-trimethylbenzene.
GLP compliance:
not specified
Remarks:
calcualted data
Type of method:
other: calculated
Media:
soil
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material (migrated information):
Not applicable
Test temperature:
Not applicable
Details on sampling:
Not applicable
Details on matrix:
Not applicable
Details on test conditions:
Not applicable
Computational methods:
Not applicable
Type:
Koc
Value:
741.65
Key result
Type:
log Koc
Value:
2.87
Details on results (HPLC method):
Not applicable
Adsorption and desorption constants:
Not applicable
Recovery of test material:
Not applicable
Concentration of test substance at end of adsorption equilibration period:
Not applicable
Concentration of test substance at end of desorption equilibration period:
Not applicable
Details on results (Batch equilibrium method):
Not applicable
Statistics:
Not applicable
Validity criteria fulfilled:
not applicable
Remarks:
QSAR
Conclusions:
The adsorption coefficient Koc of 1,3,5-trimethylbenzene was calculated as 741.65 and the Log Koc as 2.87.
Executive summary:

Koc and Log Kow were calculated using the Log Kow of 3.42 in accordance with the method defined in the TGD. This method is deemed reliable and acceptable for assessment for this endpoint. The Koc and log Koc of 1,3,5 -trimethylbenzene are therefore 741.65 and 2.87 respectively.

Description of key information

The Koc and log Koc of  1, 3, 5-trimethylbenzene were calculated to be 741.65  and 2.87 respectively.

Key value for chemical safety assessment

Koc at 20 °C:
741.65

Additional information

No reliable experimental study was identified, therefore Koc and Log Koc were calculated using the Log Kow of 3.42 in accordance with the method defined in the TGD (2003). Values reported in USEPA report (1994), have an unknown reliability, but are considered suitable as a supporting study.

[LogKoc: 2.87]