Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 244-239-0 | CAS number: 21142-29-0
Endpoint summary
Administrative data
Description of key information
3-(Triethoxysilyl)propyl methacrylate is a liquid at standard temperature and pressure, with a measured melting point of <-150°C, and a predicted boiling point of 290°C at 1013 hPa. It has a predicted density of 0.97 g/cm3 at 20°C and a predicted vapour pressure of 0.05 Pa at 25°C.
The substance is not classified for flammability according to Regulation (EC) No. 1272/2008 on the basis of a flash point of 101°C and a predicted boiling point of 290°C at 1013 hPa. It has a measured auto-ignition temperature of 260 ± 3°C at 1013 hPa, and is not explosive and not oxidising on the basis of structural examination.
In contact with water, 3-(triethoxysilyl)propyl methacrylate reacts moderately rapidly (half-life of 0.6 hours at pH 4, 23.9 hours at pH 7, 0.3 hours at pH 9 and 20-25°C) to produce 3-(trihydroxysilyl)propyl methacrylate and ethanol according to the following equation:
H2C=C(CH3)C(=O)O(CH2)3Si(OCH3CH2)3+ 3H2O → H2C=C(CH3)CO2(CH2)3Si(OH)3 + 3CH3CH2OH
3-(Triethoxysilyl)propyl methacrylate has a predicted log Kow value of 3.6 at 20°C and predicted water solubility value of 63 mg/l at 20°C.
Ethanol is miscible with water, has low log Kow (-0.3) and high vapour pressure (7910 Pa at 25°C).
The saturation concentration in water of the silanol hydrolysis product, 3-(trihydroxysilyl)propyl methacrylate is limited by condensation reactions to approximately 1000 mg/l. However, it is very hydrophilic (calculated solubility is 1E+06 mg/l using a QSAR method) with a predicted low log Kow value of -0.9. It is not surface active and it is much less volatile than the parent substance (vapour pressure = 1.2E-05 Pa at 25°C, predicted).
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
