Registration Dossier
Registration Dossier
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EC number: 207-995-2 | CAS number: 504-60-9
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Thus, a half life of 0.1 days is estimated for reaction ofpenta-1,3-dienewith hydroxyl radicals in the atmosphere at 25oC [AOPWIN Program, v.1.92] and a half-life of 0.2 days is calculated for reaction ofpenta-1,3-dienewith ozone [AOPWIN Program, v.1.91].
Overall QSARs estimated half-life for degradation ofpenta-1,3-dienein air based upon AOPWIN Model is 1.71 hours.
Based on the data on photochemical degradation ofpenta-1,3-dienein the air, it is considered to rapidly degrade in the atmosphere via photooxidation process.
The following information is taken into account for any hazard / risk / persistency assessment:
AOPWINProgram, v.1.92 estimated data:
Reaction with hydroxyl radicals at 25oC:
Overall OH Rate Constant: =105.1360 x 10-12cm3/molecule-sec
Half Life: =1.221 hours =0.102 days (12-hour day; 1.5x106OH/cm3)
AOPWINProgram, v.1.91 estimated data:
Reaction with ozone at 25oC:
Overall ozone Rate Constant: =5.26 x 10-17cm3/molecule-sec
Half Life: =5.229 hours =0.218 days (at 7x1011mol/cm3)
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