Registration Dossier
Registration Dossier
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EC number: 247-722-4 | CAS number: 26471-62-5
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key study: Becker et al 1988
Reason: study delivers half-life time in dependence on [OH*].
Key value for chemical safety assessment
- Half-life in air:
- 2 d
Additional information
A photoreactor study confirmed oxidation by photogenerated hydroxyl radicals as the significant degradation mechanism for TDI. In this study toluene was used as reference substrate and concentrations of test substance were determined by in situ IR spectroscopy. The observed degradation rate constant, 7.4x10-12 cm3/sec corresponds to a tropospheric half-life of 52 hours at an OH radical concentration of 5x105 molecule/cm3 (Becker et al., 1988).
The measured value of Becker at al (1988) is in reasonable agreement with the calculated value of Pemberton et al (2008).
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