Registration Dossier
Registration Dossier
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EC number: 220-120-9 | CAS number: 2634-33-5
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Principles of method if other than guideline:
- Method: other (calculated)
- GLP compliance:
- no
- Specific details on test material used for the study:
- 1,2-benzisothiazol-3(2H)-one
- Light source:
- other: calculation
- Key result
- DT50:
- 7.568 h
- Validity criteria fulfilled:
- yes
- Conclusions:
- The substance was found to degrade quickly in the atmosphere by reaction with OH radicals, with a half-life of 7.568 h.
- Executive summary:
A study was conducted to determine the phototransformation of the substance in air using the AOPWIN program of EPI SUITE (US EPA, 2000). The photochemical and oxidative decomposition of 1,2-benzisothiazol-3(2H)-one in air was evaluated based on theoretical grounds by a calculation according to Atkinson.
Reaction rate constant : kOH = 16.9594 × 10-12 cm3 molecule-1 sec-1
Tropospherical half-life: The half-life of 1,2-benzisothiazol-3(2H)-one in air was estimated to be 7.568 hours using kOH.
The substance was found to degrade quickly in the atmosphere by reaction with OH radicals, with a half-life of 7.568 h.
Reference
BIT degrades quickly in the atmosphere by reaction with OH radicals, having a half life of 7.568 hours. Considering the low vapor pressure of BIT (5.8 x 107 hPa), pollution of the air by the use of BIT is not expected.
Description of key information
Key value for chemical safety assessment
- Half-life in air:
- 7.568 h
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
A study was conducted to determine the phototransformation of the substance in air using the AOPWIN program of EPI SUITE (US EPA, 2000). The photochemical and oxidative decomposition of 1,2-benzisothiazol-3(2H)-one in air was evaluated based on theoretical grounds by a calculation according to Atkinson.
Reaction rate constant : kOH = 16.9594 × 10-12 cm3 molecule-1 sec-1
Tropospherical half-life: The half-life of 1,2-benzisothiazol-3(2H)-one in air was estimated to be 7.568 hours using kOH.
The substance was found to degrade quickly in the atmosphere by reaction with OH radicals, with a half-life of 7.568 h.
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