Registration Dossier
Registration Dossier
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EC number: 911-381-6 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Vapour pressure:
Constituent 1 (Vi5-D5): 0.6 Pa at 25°C (QSAR)
Constituent 2 (Vi4-D4): 93.5 Pa at 25°C (OECD 104)
Key value for chemical safety assessment
Additional information
A predicted vapour pressure value of 0.6 Pa at 25°C was determined for 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentavinylcyclopentasiloxane Vi5-D5 (CAS No: 17704-22-2) (Constituent 1 of the registration substance), using a validated QSAR estimation method. A vapour pressure of 93.5 Pa at 25ºC was determined for 2,4,6,8-tetramethyl-2,4,6,8 -tetravinylcyclotetrasiloxane Vi4-D4 (CAS 2554-06-5) (Constituent 2 of the registration substance) using a relevant test method (OECD 104). The result is considered to be reliable. The registration substance can therefore be said to be a low volatility substance at ambient temperature.
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