Registration Dossier
Registration Dossier
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EC number: 201-956-3 | CAS number: 89-98-5
Phototransformation in water
Administrative data
- Endpoint:
- phototransformation in water
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Study period:
- 2002
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: sufficiently documented publication
Data source
Reference
- Reference Type:
- publication
- Title:
- Degradation of chlorinated benzaldhydes in aqueous solutions by UV-irradiation
- Author:
- Bekbölet, M. and Getoff, N.
- Year:
- 2 002
- Bibliographic source:
- Turk. International Journal of Photoenergy 4(4), 133-139
Materials and methods
- Study type:
- indirect photolysis
- Principles of method if other than guideline:
- Photoinduced degradation of chlorinated benzaldehydes was investigated using monochromatic UV light with λ = 253.7 nm in aerated aqueous solutions.
Test material
- Reference substance name:
- 2-chlorobenzaldehyde
- EC Number:
- 201-956-3
- EC Name:
- 2-chlorobenzaldehyde
- Cas Number:
- 89-98-5
- Molecular formula:
- C7H5ClO
- IUPAC Name:
- 2-chlorobenzaldehyde
- Details on test material:
- 2-chlorobenzaldehyde was received from commercial sources in p.a. quality.
Constituent 1
Study design
- Radiolabelling:
- no
- Analytical method:
- high-performance liquid chromatography
- other: Spectrophotometer
- Light source:
- other: low pressure mercury lamp with Vycor-filter
- Light spectrum: wavelength in nm:
- 253.7
Duration of test at given test condition
- Temp.:
- 31.5 °C
- Initial conc. measured:
- 0.1 mmol/L
Results and discussion
- Rate constant (for indirect photolysis):
- 7.45 other: x10^(-3)/min
- Transformation products:
- yes
Identity of transformation productsopen allclose all
- No.:
- #1
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- chloride
- Inventory number:
- InventoryMultipleMappingImpl [inventoryEntryValue=EC 231-595-7]
- CAS number:
- 7647-01-0
- No.:
- #2
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- formaldehyde
- Inventory number:
- InventoryMultipleMappingImpl [inventoryEntryValue=EC 200-001-8]
- CAS number:
- 50-00-0
- Identity:
- Formaldehyde
- Molecular formula:
- CH2O
- Molecular weight:
- 30.026
- SMILES notation:
- C=O
- InChl:
- InChI=1/CH2O/c1-2/h1H2
Any other information on results incl. tables
Substrate degradation rate as revealed by first order kinetics: K=7.45x10-3/min;
Light intensity under the experimental conditions: I0 = 6.44 x 1016 h*v*mL-1min-1 for a optical path lenght of 1.0 cm.
During the photolysis of the chlorobenzaldehydes a strong pH-decrease was also observed, resulting from the formation of organic acids in addition to the Cl− ions.
Applicant's summary and conclusion
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