Registration Dossier
Registration Dossier
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EC number: 201-182-6 | CAS number: 79-16-3
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: Data from reliable database
Data source
Referenceopen allclose all
- Title:
- First rate constants for reactions of OH-radicals with amides
- Author:
- Koch R et al.
- Year:
- 1 997
- Bibliographic source:
- Int J Chem Kinetics 29: 81-87, cited in:HSDB (2007). Search results for N-Methylacetamide, CAS No. 79-16-3. Database content through Dec 2006.
- Reference Type:
- secondary source
- Title:
- No information
- Author:
- Meylan WM and Howard PH
- Year:
- 1 993
- Bibliographic source:
- Chemosphere 26: 2293-2299.||cited in:|HSDB (2007). Search results for N-Methylacetamide, CAS No. 79-16-3. Database content through Dec 2006.
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Method: other (measured)
- GLP compliance:
- not specified
Test material
- Reference substance name:
- N-methylacetamide
- EC Number:
- 201-182-6
- EC Name:
- N-methylacetamide
- Cas Number:
- 79-16-3
- Molecular formula:
- C3H7NO
- IUPAC Name:
- N-methylacetamide
- Details on test material:
- TS-Freetext:
N-Methylacetamide
Constituent 1
Study design
- Estimation method (if used):
- PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 500000 molecules/cm³
- Degradation rate constant: 5.20E-12 cm³/molecule-sec at 27 °C (Koch et al., 1997)
OTHER ESTIMATION METHOD: - Details on test conditions:
- Sensitiser (for indirect photolysis): OH
Sensitiser concentration: 500000 molecule/cm³
Duration of test at given test condition
- Temp.:
- 27 °C
Results and discussion
Dissipation half-life of parent compound
- DT50:
- 3.1 d
Any other information on results incl. tables
The rate constant for the vapor-phase reaction of N-methylacetamide with photochemically-produced hydroxyl radicals is 5.20E-12 cm³/molecule-sec at 27 °C (Koch et al., 1997).
This corresponds to an atmospheric half-life of about 3.1 days (SRC) at an atmospheric concentration of 5E05 hydroxyl radicals per cm³ (Meylan and Howard, 1993).
Rate constant (for indirect photolysis): = 0.0000000000052 cm³/(molecule*sec)
Degradation in % (for indirect photolysis): = 50 after 3.1 day(s)
Applicant's summary and conclusion
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