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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 200-871-9 | CAS number: 75-45-6
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Photodegradation of chlorodifluoromethane was calculated based on an overall rate constant of 0.0065 10E-12 cm3/molecule-sec and a concentration of 500,000 OH-radicals/cm3 at a 24-hr day.
Key value for chemical safety assessment
- Half-life in air:
- 2 463.04 d
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
The photodegradation of chlorodifluoromethane in air with OH-radicals was calculated with EPIWIN v.4.00, AOPWIN v.1.92. Half-life calculation based on a 24 -hr day gave a value of 2463.04 days. The substance is concluded to stay a very long time in the atmosphere.
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.
