Registration Dossier
Registration Dossier
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EC number: 210-415-0 | CAS number: 615-20-3
Phototransformation in air
Administrative data
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Study period:
- 1987
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Basic data given
Data source
Reference
- Reference Type:
- publication
- Title:
- Photochemistry of Pesticides 12 - On the Photoconversion of 1,3-Dihydro-2H-benzimidazole-2-thione, 2(3H)-Benzothiazolethione, and 2-Chlorobenzothiazole.
- Author:
- Abdou WM, Sidky MM, Wamhoff H
- Year:
- 1 987
- Bibliographic source:
- Z. Naturforsch. 42b, 1153-1158.
Materials and methods
- Principles of method if other than guideline:
- photoconversion of the substance dissolved in acetonitrile or ethanol under oxigenic conditions
- GLP compliance:
- no
Test material
- Reference substance name:
- 2-chlorobenzothiazole
- EC Number:
- 210-415-0
- EC Name:
- 2-chlorobenzothiazole
- Cas Number:
- 615-20-3
- Molecular formula:
- C7H4ClNS
- IUPAC Name:
- 2-chloro-1,3-benzothiazole
- Details on test material:
- no purity specified
Constituent 1
Study design
- Estimation method (if used):
- Analytical determination of photoproducts after TLC (thin layer chromatography), identification by spectral data
- Light source:
- other: high pressure Hg lamp
- Light spectrum: wavelength in nm:
- > 313
- Details on light source:
- Philips HPK 125
- Details on test conditions:
- 1 % w/v (15 mmol) initial concentration of the test substance, 250 mL taken to enable analysis fo phototransformation products
Duration of test at given test conditionopen allclose all
- Duration:
- 100 h
- Initial conc. measured:
- 10 other: g/L acetonitrile
- Duration:
- 120 h
- Initial conc. measured:
- 10 other: g/L ethanol
- Reference substance:
- no
- Remarks:
- (but other substances measured during same study)
Results and discussion
- Preliminary study:
- not reported
- Transformation products:
- yes
Identity of transformation productsopen allclose all
- No.:
- #1
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- 2(3H)-Benzothiazolone
- Identifier:
- common name
- Identity:
- 2(3H)-Benzothiazolone
- No.:
- #2
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- 2,2'-Dibenzothiazole
- Identifier:
- common name
- Identity:
- 2,2'-Dibenzothiazole
- No.:
- #3
Reference
- Reference substance name:
- Unnamed
- IUPAC name:
- 1,3-benzothiazole
- Inventory number:
- InventoryMultipleMappingImpl [inventoryEntryValue=EC 202-396-2]
- CAS number:
- 95-16-9
Any other information on results incl. tables
Irradiation of 2-Chlorobenzothiazole in air-saturated (or oxygented) acetonitrile led to the disappearance of the test substance after approximately 50 h. The phototransformation products were 2(3H)-Benzothiazolone (373 mg/250 mL, 16.8 %) and the symmetric dimer 2,2'-Dibenzothiazole (734 mg/250 mL, 37.5 %)
Irradiation of 2-Chlorobenzothiazole in air-saturated ethanol led to the formation of 2(3H)-Benzothiazolone (748 mg/250 mL, 33.6 %) and Benzothiazole (218 mg/250 mL, 11 %) after 120 h.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Irradiation of 2-Chlorobenzothiazole in organic solvent (acetonitrile and ethanol) in the presence of dissolved oxygen significantly decreased the concentration of the substance
- Executive summary:
Irradiation of 2-Chlorobenzothiazole in air-saturated (or oxygented) acetonitrile led to the disappearance of the test substance after approximately 50 h. The phototransformation products were 2(3H)-Benzothiazolone (373 mg/250 mL, 16.8 %) and the symmetric dimer 2,2'-Dibenzothiazole (734 mg/250 mL, 37.5 %)
Irradiation of 2-Chlorobenzothiazole in air-saturated ethanol led to the formation of 2(3H)-Benzothiazolone (748 mg/250 mL, 33.6 %) and Benzothiazole (218 mg/250 mL, 11 %) after 120 h.
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