Registration Dossier
Registration Dossier
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EC number: 202-196-5 | CAS number: 92-84-2
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Estimated using the AOPWIN v.192 software.
Key value for chemical safety assessment
- Half-life in air:
- 0.713 h
- Degradation rate constant with OH radicals:
- 1.8 cm³ molecule-1 s-1
Additional information
Phenothiazine is a very potent radical scavenger. The rate constant for the vapor-phase reaction of phenothiazine with photochemically produced hydroxyl radicals has been estimated using the AOPWIN v.192 software as 1.8X10 -10 cu cm/molecule-sec at 25 deg C. This corresponds to an atmospheric half-life of about 0.73 hours at an atmospheric concentration of 1.5X10 +6 hydroxyl radicals per cu cm.
Because Phenothiazine is a solid with very low vapour pressure and a density > 1 it is not expected, that it is present in significant amounts in the atmosphere.
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