Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Administrative data

Link to relevant study record(s)

Description of key information

The half-life in air is 1.4 h (O3) using AOPWIN model of Episuite (version 4.10, 2013). This half-life is < 2 days being the cut off for potential long range transport according to the UNECE criteria. The substance does not have an ozone depletion potential because it does not contain halogens and does not have the potential to reach the stratosphere (EU CLP, EC 1272/2008 and its amendments).

Key value for chemical safety assessment

Additional information

The photodegradation of Cyclaprop was estimated by EPIWIN AOP version 4.10. The estimated rate constants (in cm3.molecule-1.s-1) are 67.3 * 10-12(OH radicals) and 20.0 * 10-17(O3). Combined with estimated ambient atmospheric concentrations of OH-radicals, an atmospheric half-lifetime of 1.9 hours is calculated based on a 12-hour daylight average atmospheric concentration of 1.5 * 106molecule cm-3, assuming a daylight period of 12 h.

For reaction with O3, the atmospheric half -lifetime is 1.4 h with 7 * 1011mol/cm3. These data indicate that the atmospheric lifetime of Cyclaprop is sufficiently short that it will not undergo long-range transport to any significant extent.