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Partition coefficient

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Description of key information

Log Kow:

Constituent 1 Vi5-D5: 9.0 at 20 - 25°C (QSAR)

Constituent 2 Vi4-D4: 6.47 at 20 - 25°C (OECD 117)

Key value for chemical safety assessment

Log Kow (Log Pow):
6.47

Additional information

2,4,6,8,10-Pentamethyl-2,4,6,8,10-pentavinylcyclopentasiloxane Vi5-D5 (CAS No: 17704-22-2; Constituent 1) has a predicted log Kow value of 9.0, using a validated QSAR estimation method. A measured log Kow of 6.47 at 20 - 25°C was determined for 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane Vi4-D4 (CAS 2554-06-5; Constituent 2), using an appropriate test method (OECD TG 117). Although full details are not available, the result is considered to be reliable.

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