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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The adsorption coefficient (Koc) of the test material has been determined to be in the range log10Koc 5.49 to >5.63.

Key value for chemical safety assessment

Koc at 20 °C:
427 000

Additional information

ADSORPTION COEFFICIENT

Method

The determination was carried out using the HPLC screening method, Method C19 of Commission Directive 2001/59/EC (which constitutes Annex V of Council Directive 67/548/EEC).

Results

The retention times, capacity factors and log10Kocvalues determined for the sample are shown in the table below:

Component

Injection

Retention Time (mins)

Capacity Factor (K)

log10K

log10Koc

Koc

Trimer

1

25.425

10.366

1.016

5.49

3.06 x 105

2

25.284

10.303

1.013

5.48

Tetramer

1

43.370

18.388

1.265

>5.63

>4.27 x 105

2

42.924

18.188

1.260

>5.63

Pentamer

1

77.681

33.726

1.528

>5.63

>4.27 x 105

2

76.760

33.314

1.523

>5.63

Conclusion

The adsorption coefficient (Koc) of the test material has been determined to be in the range 3.06 x 105to >4.27 x 105, log10Koc5.49 to >5.63.

[LogKoc: 5.63]