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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 223-228-4 | CAS number: 3775-90-4
Biodegradation in soil
Administrative data
Link to relevant study record(s)
Description of key information
2-tert-butylaminoethyl methacrylate (TBAEMA) is considered to be hydrolytically unstable. Half-lives of 3.3 h, 4.5 days and > 1 year were observed for a structurally strongly related substance N,N-Dimethylaminoethyl Methacrylate (DMAEMA) at resp pH 9 at 25 °C, pH 7 at 25 °C and pH 4 at 50 °C. In contrast with DMAEMA, TBAEMA was found the be only partly bioderadable. One of the two hydrolysis products is quickly biodegraded and the other is most likely not.
Key value for chemical safety assessment
- Half-life in soil:
- 4.5 d
- at the temperature of:
- 25 °C
Additional information
2-tert-butylaminoethyl methacrylate CAS 3775-90-4 is a monomer used in the manufacture of acrylic copolymers used as ingredients in personal care and industrial products. Manufacture of the monomer and the polymers containing it, takes place outside the European Community. The 2-tert-butylaminoethyl methacrylate is typically incorporated in the polymer at up to 4% with more than >99.75 % of the monomer bound in the polymer with only <0.25 % of unbound residual monomer. The estimated remaining residual fraction is <0.01% in polymers imported into the EU is therefore <0.2 tons (<200kg). Due to the limited stability of the 2-tert-butylaminoethyl methacrylate under environmental conditions and the negligible potential for exposure in the environment it is considered justified to waive Annex IX ecotoxicity testing.
In addition: 2-tert-butylaminoethyl methacrylate is quickly (bio)degraded into two products from which one is quickly further biodegraded to CO2, NH3 and H2O. The other product is unlikely to be further biodegraded. It is therefore considered to be scientifically unjustified to study the persistency of this product in more detail in simulation tests.
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.
