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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 202-980-7 | CAS number: 101-83-7
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Half-life (DT50): 2.9 hours; degradation rate constant: 131.7 E-12 cm³ molecule-1 s-1 for reaction with: OH radicals (calculated with SRC-AOP Win v 1.91).
Key value for chemical safety assessment
- Half-life in air:
- 2.9 h
- Degradation rate constant with OH radicals:
- 500 cm³ molecule-1 d-1
Additional information
There are no experimental data on the stability of dicyclohexylamine in the atmosphere.
The calculated half-life of dicyclohexylamine in air due to indirect photodegradation is 2.9 hours, considering a reaction constant of 131.7 x 10-12 cm3/molecule.sec and a daily mean (24-h) OH-radicals concentration of 500,000 radicals/cm3 (Bayer Industry Services, 2005a).
The recalculated half-life of dicyclohexylamine in air using the latest version of AopWin v1.92 is 0.974 hours, considering a reaction constant of 131.7 E-12 cm3/molecule.sec and a daily mean (12-h) OH-radicals concentration of 150,000 radicals/cm3.
DCHA has a high log Kow-value, it will probably mostly be abundant in sediment and soil and hence not being exposed to sunlight (IVL Report B1817, 2008).
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.
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