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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties


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Description of key information

Density: 0.9875 g/cm3 at 20±0.02°C

Key value for chemical safety assessment

Relative density at 20C:

Additional information

A measured density value of 0.9875 g/cm3 at 20±0.02°C was obtained for the submission substance using a calibrated 10 ml pycnometer. The result is considered to be reliable and is selected as key study. A second measured relative density value of 0.988 g/cm³ at 20 °C was determined for the low purity form of the submission substance using a pycnometer method in accordance with OECD Test Guideline 109 and in compliance with GLP.

2,4,6,8,10 -Pentamethyl-2,4,6,8,10-pentavinylcyclopentasiloxane Vi5-D5 (CAS No: 17704-22-2; impurity 1) and 2,4,6-trimethyl-2,4,6-trivinylcyclotrisiloxane Vi3-D3 (CAS No: 3901-77-7; impurity 2) may be present as impurities. Predicted density values of 0.95 g/cm3and 0.92 g/cm3at 20°C were determined for Vi5-D5 and Vi3-D3, respectively.