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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 482-130-1 | CAS number: -
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
The SRC AOPWIN program was used to obtain values of the rate constant kOH for reaction of each constituent with hydroxyl radicals. The program outputs are used to calculate a weighted average value for each block based on the modelled composition of ' Paraffin waxes (Fischer–Tropsch), full-range, C15–C50 branched and linear'. The calcuated values are presented in Table xxx of the CSR.
EUSES 2.1.2 calculates an overall half-life in air under default conditions of hydroxyl radical concentration, using the following expressions:
kdegair (d-1) = kOH (cm3/molecule-sec) x OHConcair (molec/cm3) x 24 x 3600
Half-life is then calculated as:
DT50 (d) = ln 2/ kdegair (d-1)
Where:
kdegair = total rate constant for degradation in air
kOH = rate constant for reaction with hydroxyl radicals
OHConcair = concentration of hydroxyl radicals in air
DT50 = half-life
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.
