Registration Dossier
Registration Dossier
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EC number: 202-716-0 | CAS number: 98-95-3
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Meets generally accepted scientific standards, well documented an reliable for assessment.
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- Atmospheric chemistry of aniline, N,N-dimethylaniline, pyridine, 1,3,5-triazine and nitrobenzene
- Author:
- Atkinson R. et al.
- Year:
- 1 987
- Bibliographic source:
- Environ Sci Technol 21: 64-72
- Reference Type:
- secondary source
- Title:
- European Union Risk Assessment Report, Nitrobenzene, CAS No: 98-95-3
- Author:
- European Chemicals Bureau
- Year:
- 2 007
- Bibliographic source:
- 3rd Priority List, Volume: 77
Materials and methods
- Principles of method if other than guideline:
- Nitrobenzene was irradiated in a Teflon-chamber with a Xenon lamp.
- GLP compliance:
- no
Test material
- Reference substance name:
- Nitrobenzene
- EC Number:
- 202-716-0
- EC Name:
- Nitrobenzene
- Cas Number:
- 98-95-3
- Molecular formula:
- C6H5NO2
- IUPAC Name:
- nitrobenzene
- Details on test material:
- - Name of test material (as cited in study report): Nitrobenzene
Constituent 1
Study design
- Estimation method (if used):
- PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 500000
- Degradation rate constant: 0.7E-12 cm³/molecule*sec
- Temperature for which rate constant was calculated: ca. 23°C - Light source:
- Xenon lamp
- Light spectrum: wavelength in nm:
- > 290
Duration of test at given test condition
- Temp.:
- 23 °C
- Initial conc. measured:
- 0.005 mg/L
Results and discussion
Dissipation half-life of parent compound
- DT50:
- > 23 d
Any other information on results incl. tables
In this experimental system no decay of nitrobenzene was observed outside of the analytical uncertainties. Hence, the upper limit of the reaction rate constant was determined to be 7E-13 cm3/(molecules.sec). Given an OH-concentration of 5E+05 molecules.cm-3 this leads to an atmospheric half-life of more than 23 days.For calculation of half-life, a 24 hour day was assumed.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- After evaporation or exposure to the air, the substance will be slowly degraded by photochemical processes.
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