Registration Dossier
Registration Dossier
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EC number: 257-407-3 | CAS number: 51772-85-1
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Vapour pressure [3-[tris(acetoxy)silyl]propyl methacrylate]: 0.009 Pa at 25°C (QSAR)
Vapour
pressure [3-(trihydroxysilyl)propyl methacrylate]: 1.2E-5 Pa at 25°C
(QSAR)
Vapour
pressure [acetic acid]: 2090 Pa at 25°C (secondary literature)
Key value for chemical safety assessment
- Vapour pressure:
- 0.009 Pa
- at the temperature of:
- 25 °C
Additional information
A predicted vapour pressure value of 0.009 Pa at 25°C was obtained for the submission substance using a validated QSAR estimation method. This calculated value is based on the predicted boiling point of 320°C for the undecomposed form of the submission substance. Measurements have resulted in a measured boiling point of 215°C with indications of decomposition of the submission substance from about 128°C. Therefore, predicted vapour pressure value of 8.8 Pa at 25°C was obtained using measured boiling point of 215°C. Both predicted results are in the same fugacity band for worker exposure assessment. The result is considered to be reliable and is selected as key study.
In contact with water, the substance hydrolyses very rapidly forming 3-(trihydroxysilyl)propyl methacrylate and acetic acid. The silanol hydrolysis product, 3-(trihydroxysilyl)propyl methacrylate, has a predicted vapour pressure of 1.2E-5 Pa at 25°C using a validated QSAR estimation method.
A vapour pressure of 2090 Pa at 25°C was reported in secondary literature for acetic acid (Daubert and Danner, 1985).
Reference:
Daubert and Danner (1985). DaubertT E and Danner R P. Physical and Thermodynamic properties of Pure Chemicals. Data Compilation
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.
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