Registration Dossier
Registration Dossier
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EC number: 203-714-2 | CAS number: 109-87-5
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
The half-life of methyal in the atmosphere is 2.3 days.
Key value for chemical safety assessment
- Half-life in air:
- 2.3 d
- Degradation rate constant with OH radicals:
- 6.69 cm³ molecule-1 s-1
Additional information
Methylal half-life in air is reported in the National Library of Medicines’s Hazardous Substance Data Base file (HSDB) as follows. “Vapor phase methylal will react with photochemically-produced hydroxyl radicals in the atmosphere by H abstraction. The estimated rate of this reaction is 6.69x10-12 cu cm/molec-sec. Assuming a hydroxyl radical concentration of 5x10 +5 per cu cm, the half-life of methylal in the atmosphere is 2.3 days."
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