Registration Dossier

Administrative data

Endpoint:
adsorption / desorption: screening
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study acc. to OECD guideline and following GLP principles

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)
Deviations:
yes
Remarks:
test perfomed with 3 soils instead of 5 soils
GLP compliance:
yes
Type of method:
batch equilibrium method
Media:
soil

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
- Name of test material (as cited in study report): Triethylenetetramine
- Physical state: Pale yellow liquid
- Purity: 96.2%
- Lot/batch No.: P0632
- Expiration date of the lot/batch: 14-08-2010
- Stability under test conditions: assumed to be stable at test and storage conditions
- Storage condition of test material: room temperature in the dark

Study design

Test temperature:
20 - 25°C

Batch equilibrium or other method

Analytical monitoring:
yes
Details on sampling:
- Concentrations: 1 g/L
- Sampling interval: 24 hours
- Sample storage before analysis: no
Details on matrix:
LUFA standard soil 2.2
Name: LUFA standard soil 2.2
Location:
Groβer Striet no. 585
Hanhofen
Germany
Sampling date: 29-07-2009
Texture: Loamy sand
pH (0.01M CaCl2) 5.5 ± 0.1
Organic carbon (%): 2.09 ± 0.40
Particle size distribution:
%clay (< 2µm): 6.4 ± 0.9
% silt (2 – 50 µm): 11.6 ± 0.7
% sand (50 – 2000 µm): 82.0 ± 0.7
CEC (meq/100g) 10.0 ± 0.5
Water holding capacity (%) 46.5 ± 6.0

LUFA standard soil 6S
Name: LUFA standard soil 6S
Location:
In der unteren Hohnert no. 2412
Siebeldingen
Germany
Sampling date: 17-08-2009
Texture: Clay
pH (0.01M CaCl2) 7.2 ± 0.1
Organic carbon (%): 1.69 ± 0.17
Particle size distribution:
%clay (< 2µm): 41.7 ± 1.3
% silt (2 – 50 µm): 36.1 ± 2.2
% sand (50 – 2000 µm): 22.2 ± 1.5
CEC (meq/100g) 22.0 ± 6.6
Water holding capacity (%) 39.6 ± 5.0

3Eurosoil no. 4
Name: Eurosoil no.4, certified reference material IRMM 443-4
Location: Data can be obtained from IRMM
Sampling date: Data can be obtained from IRMM
Texture (USDA): Silt
pH (0.01M CaCl2) 6.8 ± 0.6
Organic carbon (%): 1.31
Particle size distribution:
%clay (< 2µm): 20.3
% silt (2 – 50 µm): 75.7
% sand (50 – 2000 µm): 4.1
CEC (meq/100g) 17.3
Water holding capacity (%) Data can be obtained from IRMM
Details on test conditions:
TEST CONDITIONS
- Buffer: 0.01M CaCl2
- pH: 7 - 8

TEST SYSTEM
- Type, size and further details on reaction vessel: Glass centrifuge tube of 40 mL volume closed with teflon cap
- Water filtered (i.e. yes/no; type of size of filter used, if any): no
- Amount of soil/sediment/sludge and water per treatment (if simulation test): 0.4 g of soil and 40 mL of liquid
- Soil/sediment/sludge-water ratio (if simulation test): 1 : 100
- Number of reaction vessels/concentration: 2
- Measuring equipment: pH meter
- Test performed in closed vessels due to significant volatility of test substance: yes
- Test performed in open system: no
- Method of preparation of test solution: stock colution of test substance made in 0.01 M CaCl2
- Are the residues from the adsorption phase used for desorption: yes
- Other:
Duration of adsorption equilibration
Sample No.:
#1
Duration:
24 h
Initial conc. measured:
1 000 mg/kg soil d.w.
Temp.:
22 °C
Duration of desorption equilibration
Sample no.:
#1
Duration:
48 h
Temp.:
22 °C

Results and discussion

Adsorption coefficientopen allclose all
Type:
log Koc
Value:
3.2
Temp.:
22 °C
% Org. carbon:
2.09
Remarks on result:
other: LUFA 2.2
Type:
log Koc
Value:
3.7
Temp.:
22 °C
% Org. carbon:
1.69
Remarks on result:
other: LUFA 6S
Type:
log Koc
Value:
3.6
Temp.:
22 °C
% Org. carbon:
1.31
Remarks on result:
other: Eurosoil 4

Results: HPLC method

Details on results (HPLC method):
- Retention times of reference substances used for calibration: 24 - 28 min
- Details of fitted regression line (log k' vs. log Koc): r2 = 0.9944
- Graph of regression line attached
- Average retention data for test substance:

Applicant's summary and conclusion