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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 219-371-7 | CAS number: 2425-79-8
Endpoint summary
Administrative data
Description of key information
Additional information
Reading across results from EPIKOTE 828 (CAS No. 25068-38-6), the registered substance is considered to be susceptible to hydrolysis at pH 4, 7, and 10, with a hydrolysis half-life of 117 hrs at 25 °C (95% confidence range: 68–204 h). Products of hydrolysis are expected to be the mono-diol and the di-diol from ring-opening of the two epoxy groups.
Also, evidence of hydrolysis of the registered substance was observed during its water solubility test (Štreit, 2010). A review of “Fig. No. 1:LC/MS analysis of Grilonit 1/10 water solution” in the Annexes reveal that the primary peak (Retention Time = 10.2 mins) fell from ~3.5 to ~2.2 over the course of the 4-day experiment (3 days at 30°C + 1 at 20°C). This amounts to a 37% loss of the primary component over this 96-hour [4 day] period, which is most probably due to ring-opening hydrolysis of the epoxy groups, and compares well with the 50% loss seen for the read-across substance in 117 hrs [~4.9] days at 25°C, further supporting the read-across.
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.
