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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 202-613-0 | CAS number: 97-86-9
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Model calculation using EpiSuite 4.10 (AOP program v1.92, US-EPA, 2008):
Half-life for reaction with hydroxyl radicals ( 0.5E6 OH/cm³) = 16.97 h
Half-life for reaction with ozone (at 7E11 mol/cm³) = 24.2 h
Combined calculation result = 10 h
Key value for chemical safety assessment
- Half-life in air:
- 16.97 h
Additional information
The methacrylate esters do not possess UV-absorbing structures. Therefore, direct photolysis is not expected to occur to any significant degree.
Photodegradation in the atmosphere is expected to occur either by reaction with photo-chemically produced hydroxyl radicals or by reaction with ozone. For reaction with ozone an atmospheric half-life of approximately one day has been calculated for i-BMAusing EpiWin v4.10 AOP v1.92 and for the reaction with hydroxyl radicals a half life of 16.97 h was estimated.
In conclusion, after evaporation or emission to air, i-butyl methacrylate will be rapidly degraded by photochemical processes.
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.
