1-[2-(allyloxy)ethyl-2-(2,4-dichlorophenyl)-1H-imidazolium hydrogen sulphate

Adsorption / desorption

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

1995-09-13 - 1996-05-23

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Remarks:

only a range for kd available, limited data

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

other: DoE Toxicity Tests in Support of Enviornmental Quality Standards

Version / remarks:

Final Report DoE 3460(P), S Vine & M Crane

Deviations:

yes

GLP compliance:

yes

Type of method:

HPLC estimation method

Media:

sediment

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: V840-413
- Expiration date of the lot/batch: July 1996
- Purity: 100.43%

RADIOLABELLING INFORMATION (if applicable)
- Radiochemical purity: 99.2%
- Specific activity: 26.85 MBq
- Locations of the label: 14C
- Expiration date of radiochemical substance: 29 May 1996

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: radiolabelled test susbtance at approximately -20 °C

Radiolabelling:

yes

Analytical monitoring:

yes

Details on sampling:

SEDIMENT
- Concentrations: sediments were extracted using methanol (100 mL)
- Sampling interval: one day before the start (addition of the larvae) and days 0, 1, 4, 7, 14, 17 (test end)
- Sample storage before analysis: not indicated

OVERLYING WATER
- Concentrations: 1 mL aliquots of test medium were taken from the test vessels
- Sampling interval: daily
- Sample storage before analysis: not indicated

Matrix no.:

#1

Matrix type:

sandy loam

% Org. carbon:

2.3

Details on matrix:

COLLECTION AND STORAGE
- Geographic location: Millstream pond (a site known to be free of contamination)
- Collection procedures: the sediment was diluted with silversand to give an organic carbon content of approximately 3.76% (organic matter content of 6.48%)
- Storage conditions: complete darkness at approximately 4 °C
- Soil preparation (e.g.: 2 mm sieved; air dried etc.):

PROPERTIES
- Soil texture
- 11.2 % < 2µm
3.0%: 2-6 µm
4.0%: 6-20 µm
5.3%:20-63 µm
66.3%: 63-212 µm
9.7%: 212 and 600 µm

Sample No.:

#1

Phase system:

sediment-water

Type:

other: Kd

Remarks:

mean kd from two replicates

Value:

202 L/kg

Remarks on result:

other: nominal concentration added: 0.25 mg/L

Sample No.:

#2

Phase system:

sediment-water

Type:

other: Kd / mean from two replicates

Value:

158 L/kg

Remarks on result:

other: nominal concentration added: 2.5 mg/L

Sample No.:

#3

Phase system:

sediment-water

Type:

other: Kd / mean from two replicates

Value:

105 L/kg

Remarks on result:

other: nominal concentration added: 25 mg/L

Sample No.:

#4

Phase system:

sediment-water

Type:

other: Kd / mean from two replicates

Value:

66 L/kg

Remarks on result:

other: nominal concentration added: 250 mg/L

Transformation products:

not measured

Conclusions:

The Kd (sediment: water equilibrium constant) of imazalil was estimated using the HPLC method. A range of Kd values from 66 to 202 L/Kg was determined.

Reference 2

Endpoint:

adsorption / desorption: screening

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Qualifier:

no guideline available

Principles of method if other than guideline:

Based on calculation method

Type of method:

other: calculation method

Matrix no.:

#1

Matrix type:

sand

% Org. carbon:

0.821

pH:

4

Matrix no.:

#2

Matrix type:

sandy loam

% Org. carbon:

4.35

pH:

6.7

Matrix no.:

#3

Matrix type:

silt loam

% Org. carbon:

1.914

pH:

5.1

Matrix no.:

#4

Matrix type:

silt loam

% Org. carbon:

2.436

pH:

7

Matrix no.:

#5

Matrix type:

sand

% Org. carbon:

0.07

pH:

4.1

Matrix no.:

#6

Matrix type:

loamy sand

% Org. carbon:

3.85

pH:

4.3

Matrix no.:

#7

Matrix type:

sandy loam

% Org. carbon:

4.39

pH:

6.7

Matrix no.:

#8

Matrix type:

loam

% Org. carbon:

2.71

pH:

7

Matrix no.:

#9

Matrix type:

silt loam

% Org. carbon:

2.7

pH:

5.8

Matrix no.:

#10

Matrix type:

Silt

% Org. carbon:

2.42

pH:

6.1

Matrix no.:

#11

Matrix type:

silty clay loam

% Org. carbon:

3.25

pH:

7.4

Matrix no.:

#12

Matrix type:

silt loam

% Org. carbon:

5.01

pH:

7.2

Sample No.:

#1

Type:

Koc

Value:

4 704 L/kg

pH:

4

Matrix:

sand

% Org. carbon:

0.821

Sample No.:

#2

Type:

Koc

Value:

3 543 L/kg

pH:

6.7

Matrix:

sandy loam

% Org. carbon:

4.35

Sample No.:

#3

Type:

Koc

Value:

8 150 L/kg

pH:

5.1

Matrix:

silt loam

% Org. carbon:

1.914

Sample No.:

#4

Type:

Koc

Value:

5 532 L/kg

pH:

7

Matrix:

silt loam

% Org. carbon:

2.436

Sample No.:

#5

Type:

Koc

Value:

4 152 L/kg

pH:

4.1

Matrix:

sand

% Org. carbon:

0.07

Sample No.:

#6

Type:

Koc

Value:

2 080 L/kg

pH:

4.3

Matrix:

loamy sand

% Org. carbon:

3.85

Sample No.:

#7

Type:

Koc

Value:

3 134 L/kg

pH:

6.7

Matrix:

sandy loam

% Org. carbon:

4.39

Sample No.:

#8

Type:

Koc

Value:

6 918 L/kg

pH:

7

Matrix:

loam

% Org. carbon:

2.71

Sample No.:

#9

Type:

Koc

Value:

6 951 L/kg

pH:

5.8

Matrix:

silt loam

% Org. carbon:

2.7

Sample No.:

#10

Type:

Koc

Value:

4 537 L/kg

pH:

6.1

Matrix:

silt

% Org. carbon:

2.41

Sample No.:

#11

Type:

Koc

Value:

3 436 L/kg

pH:

7.4

Matrix:

silty clay loam

% Org. carbon:

3.25

Sample No.:

#12

Type:

Koc

Value:

3 901 L/kg

pH:

7.2

Matrix:

silt loam

% Org. carbon:

5.01

Validity criteria fulfilled:

yes

Conclusions:

The mobility of imazalil in soil was evaluated and vere investigated in 12 soils. The resulting Koc werein range of 2080 to 8150 l/K with an arithm mean of 4753 l/kg, indicating a high immobility in soil.

Description of key information

The mobility of imazalil in soil was evaluated during the active substance renewal. Those Koc values can be taken over for imazalil sulphate. The resulting Kfoc values were in the range of 2080 to 8150 L/Kg, indicating a high immobility in soil.

In a sediment test, using imazalil sulphate, a range of Kd values were determined (66 -202 l/kg).

Key value for chemical safety assessment

Koc at 20 °C:

4 753

Other adsorption coefficients

Type:

log Kp (solids-water in sediment)

Value in L/kg:

1.8

at the temperature of:

20 °C