Registration Dossier
Registration Dossier
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EC number: 205-840-3 | CAS number: 155-04-4
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
In the atmosphere a half-life of 4.3 hours for ZMBT due to reaction with photochemically produced hydroxyl radicals is estimated by AOPWIN v1.92 with a rate constant of 9.03 *10-11cm3/(molecule*sec), considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average (Currenta, 2010). The estimated half-life in air of ZMBT is much shorter than 48 hours and hence no potential for long-range transport of ZMBT in air is expected.
Key value for chemical safety assessment
- Half-life in air:
- 4.3 h
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
the atmosphere a half-life of 4.3 hours for ZMBT due to reaction with
In the atmosphere a half-life of 4.3 hours for ZMBT due to reaction with photochemically produced hydroxyl radicals is estimated by AOPWIN v1.92 with a rate constant of 9.03 *10-11cm3/(molecule*sec), considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average (Currenta, 2010). The estimated half-life in air of ZMBT is much shorter than 48 hours and hence no potential for long-range transport of ZMBT in air is expected.
photochemically produced hydroxyl radicals is estimated by AOPWIN v1.92 with a rate constant of 9.03 *10-11cm3/(molecule*sec), considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average (Currenta, 2010). The estimated half-life in air of ZMBT is much shorter than 48 hours and hence no potential
for long-range transport of ZMBT in air is expected.
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