Registration Dossier
Registration Dossier
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: 270-654-1 | CAS number: 68475-60-5
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data calculated from several sources, limitations in reporting but considered reliable with restriction
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Kinetics and mechanisms of gas-phase reactions with the hydroxyl radical with organic compounds under atmospheric conditions.
- Author:
- Atkinson, R.
- Year:
- 1 985
- Bibliographic source:
- Chem. Rev. 85, 61-201.
Materials and methods
- Principles of method if other than guideline:
- Measured data from author and other investigators were quality assessed and then used to develop rate constants for different chemicals. The author applied a least squares analysis of degradation rate constants to calculate a preferred value.
Test material
- Reference substance name:
- Methane
- EC Number:
- 200-812-7
- EC Name:
- Methane
- Cas Number:
- 74-82-8
- IUPAC Name:
- methane
Constituent 1
Study design
- Estimation method (if used):
- Calculated half life based on a rate constant of 8.41E-15 cm3 / molecule / sec, OH-radical concentration 5.105 molecules.cm-3, as specified in the TGD
- Details on test conditions:
- at 298K
Results and discussion
Dissipation half-life of parent compound
- DT50:
- 1 906 d
Applicant's summary and conclusion
- Conclusions:
- The half life of methane has been estimated to be 1908 days based on a recommended reaction rate with hydroxyl radicals and the concentration of hydroxyl radicals recommended in the Technical Guidance Document (2003).
- Executive summary:
Measured data from author and other investigators were quality assessed and then used to develop rate constants for different chemicals. Therefore, this value represents a valid rate constant for methane based on all valid studies at the time of publication.
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.
