potassium;1-(4-chlorophenyl)pyrazol-3-olate

Adsorption / desorption

Administrative data

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2014

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)

Version / remarks:

2000

Deviations:

no

GLP compliance:

yes

Type of method:

batch equilibrium method

Media:

soil

Test material

Test material information

Constituent 1

Reference substance name:

1-(4-chlorophenyl)pyrazol-3-ol

EC Number:

616-307-3

Cas Number:

76205-19-1

Molecular formula:

C9 H7 Cl N2 O

IUPAC Name:

1-(4-chlorophenyl)pyrazol-3-ol

Specific details on test material used for the study:

- Batch No. 724-2102
- Expiry date: No data
- Radiochemical purity: 99.8%

Radiolabelling:

yes

Study design

Test temperature:

20 °C

Batch equilibrium or other method

Analytical monitoring:

yes

Details on sampling:

- A solution to soil ratio of 25:1 with an equilibration time of 4 hours was chosen.
- Concentrations: For the determination of the adsorption isotherm, five different concentrations (nominal 0.001, 0.01, 0.025, 0.05 and 0.1 µg/mL) of the test item in 0.01 mol/L CaCl2 solutions were used.
- Sample method: The adsorption behavior of the test substance was investigated using five European soils.
1 - Sampling interval: The adsorption equilibrium test was carried out with the test substance in all five soils and with 5 test intervals (2, 4, 8 and 24 hours), in duplicate.
- Sample storage before analysis: All samples were equilibrated in the dark at 20 ± 2 °C

Matrix properties

Matrix properties 1

Matrix no.:

#1

Matrix type:

other: Bruch West

% Clay:

11.3

% Silt:

25.1

% Sand:

63.7

% Org. carbon:

1.63

pH:

7.3

CEC:

11.9 meq/100 g soil d.w.

Matrix properties 2

Matrix no.:

#2

Matrix type:

other: Nierswalde Wildacker

% Clay:

8.8

% Silt:

73.5

% Sand:

17.7

% Org. carbon:

1.85

pH:

5.7

CEC:

3.1 meq/100 g soil d.w.

Matrix properties 3

Matrix no.:

#3

Matrix type:

other: LUFA 2.1

% Clay:

2.3

% Silt:

6.9

% Sand:

90.8

% Org. carbon:

0.6

pH:

5.6

CEC:

-0.7 meq/100 g soil d.w.

Matrix properties 4

Matrix no.:

#4

Matrix type:

other: LUFA2.3

% Clay:

8.3

% Silt:

23.1

% Sand:

68.6

% Org. carbon:

0.99

pH:

6.7

CEC:

7.5 meq/100 g soil d.w.

Matrix properties 5

Matrix no.:

#5

Matrix type:

other: La Gironda

% Clay:

27.7

% Silt:

23

% Sand:

49.2

% Org. carbon:

1.22

pH:

7.4

CEC:

26.3 meq/100 g soil d.w.

Results and discussion

Adsorption coefficient

Adsorption coefficient 1

Sample No.:

#1

Type:

Koc

Value:

785 L/kg

pH:

5.6

Temp.:

20 °C

Matrix:

LUFA 2.1

% Org. carbon:

0.6

Adsorption coefficient 2

Sample No.:

#2

Type:

Koc

Value:

687 L/kg

pH:

5.7

Temp.:

20 °C

Matrix:

LUFA 2.3

% Org. carbon:

0.09

Adsorption coefficient 3

Key result

Sample No.:

#3

Type:

Koc

Value:

400 L/kg

pH:

7.3

Temp.:

20 °C

Matrix:

Bruch West

% Org. carbon:

1.63

Adsorption coefficient 4

Sample No.:

#4

Type:

Koc

Value:

830 L/kg

pH:

5.7

Temp.:

20 °C

Matrix:

Nierswalder Wildacker

% Org. carbon:

1.85

Adsorption coefficient 5

Sample No.:

#5

Type:

Koc

Value:

831 L/kg

pH:

7.4

Temp.:

20 °C

Matrix:

La Gironda

% Org. carbon:

1.22

Results: Batch equilibrium or other method

Transformation products:

yes