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Environmental fate & pathways

Adsorption / desorption

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Endpoint:
adsorption / desorption, other
Remarks:
Expert Statement on the absorption coefficient for soils and sediment
Type of information:
other: Expert Statement
Adequacy of study:
key study
Study period:
2002-07-09
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Qualifier:
no guideline followed
Principles of method if other than guideline:
The estimation was performed based on a water solubility of 5500 mg/l using regression equations.
GLP compliance:
no
Type of method:
other: estimation
Media:
other: estimation for soil and sediment
Key result
Type:
Koc
Value:
>= 38
Remarks on result:
other: classified as slightly mobile in soils
Validity criteria fulfilled:
not applicable
Conclusions:
The expert statement uses an scientifically reasonable estimation method for the classification of the mobility of the test item in soil. The adsorption coefficient Koc of 6-amino-1,3-dimethyluracil was estimated to be 38 or higher. This means that 6-amino-1,3-dimethyluracil is classified as slightly mobile in soils.
Executive summary:

The adsorption coefficient Koc of 6-amino-1,3-dimethyluracil was estimated via regression equations in an expert statement to be 38 or higher. This means that 6-amino-1,3-dimethyluracil is classified as slightly mobile in soils.

Endpoint:
adsorption / desorption
Remarks:
adsorption
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Scientifically acceptable estimation method
Principles of method if other than guideline:
Calculated using PCKOCWIN v1.66
GLP compliance:
no
Type of method:
other: Calculated
Media:
soil
Type:
Koc
Value:
10
Key result
Type:
log Koc
Value:
0.999

Description of key information

Adsorption / desorption: Koc ≥ 38, slightly mobile in soils (expert statement, estimation via regression equations)

Adsorption / desorption: Koc = 10, logKoc = 0.999 (PCKOCWIN v1.66 estimation)

Key value for chemical safety assessment

Koc at 20 °C:
38

Additional information

[LogKoc: 1.58]