Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
adsorption / desorption: screening
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reason / purpose for cross-reference:
read-across source
Key result
Type:
log Koc
Value:
>= 3.05 - ca. 5.63 other: log Koc
Temp.:
40 °C
Type:
Koc
Value:
>= 1 110 - ca. 427 000 other: log Koc
Temp.:
40 °C
Details on results (HPLC method):
- Retention times of reference substances used for calibration: retention times ranged from 3.979 to 43.617 min (See Table 3 )

- Details of fitted regression line (log k' vs. log Koc): slope = 0.339 ; intercept = -0.640 ; R2= 0.972

- Graph of regression line attached: Yes See Figure 1

- Retention data for test substance: Retention times of test material ranged from 9.404 to > 60 min. (See Table 4 and Figure 2)

Table 3: Reference Standards: Retention Times, Capacity Factors and Adsorption Coefficients

Reference Standard

Injection 1

Injection 2

Mean

Capacity factor(k)

Log k

Log Koc

Acetanilide

3.978

3.980

3.979

0.464

-0.334

1.25

Phenol

3.811

3.810

3.811

0.402

-0.396

1.32

Atrazine

5.682

5.687

5.685

1.091

0.038

1.81

Isoproturon

6.007

6.021

6.014

1.213

0.084

1.86

Triadimenol

8.112

8.116

8.114

1.985

0.298

2.40

Linuron

8.496

8.500

8.498

2.127

0.328

2.59

Naphthalene

7.308

7.309

7.309

1.689

0.228

2.75

Endosulfan-diol

10.232

10.208

10.220

2.760

0.441

3.02

Fenthion

13.079

13.068

13.074

3.810

0.581

3.31

α-Endosulfan

18.882

16.942

17.912

5.590

0.747

4.09

Phenanthrene

15.182

15.188

15.185

4.587

0.662

4.09

DDT

43.709

43.524

43.617

15.047

1.177

5.63

Table 4: Test Material: Retention Times, Capacity Factors and Adsorption Coefficients

Peak number

Injection

Retention time (min)

Capacity factor, k

log K

logKoc

Mean log Koc

% area (mean)

1

1

9.404

2.460

0.391

3.040

3.05

10.8

2

9.427

2.468

0.392

3.050

2

1

10.518

2.870

0.458

3.240

3.240

10.1

2

10.552

2.882

0.460

3.250

3

1

39.838

13.657

1.135

5.240

5.240

14.7

2

39.919

13.687

1.136

5.240

4

1

> 60

> 21.079

> 1.324

> 5.63

> 5.63

64.4

2

> 60

> 21.079

> 1.324

>5.63
Validity criteria fulfilled:
yes
Remarks:
Instrument response was linear with an R2 value of 0.972
Conclusions:
The test material contains a mixture of components with logKoc values ranging from 3.05 to > 5.63
Executive summary:

The adsorption coefficient of the test material was determined by HPLC following the guidelines in EU Method C.19. The test substance is a mixture of components with log Koc values ranging from 3.05 to > 5.63. The distribution of log Koc values by area % is:

Mean log Koc

Mean Area %

 3.05

10.8

 3.24

10.1

 5.24

14.7

>5.63

64.4

Description of key information

The test material contains a mixture of components with log Koc values ranging from 3.05 to > 5.63

Key value for chemical safety assessment

Koc at 20 °C:
5.63

Additional information

[LogKoc: 0.751]