Registration Dossier
Registration Dossier
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EC number: 202-509-5 | CAS number: 96-48-0
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Half-life: 2.9 hours (measured) to 55.6 hours (estimated)
Atmospheric OH Rate Constant:
- 2.3 E-12 cm3/molecule-sec (estimated)
- 44.5 E-12 cm3/molecule-sec (measured)
Key value for chemical safety assessment
- Half-life in air:
- 5 d
Additional information
A measured atmospheric OH rate constant of 44.5E-12 cm3/molecule-sec (Blerbach, 1994) and half-life of 2.9 hours (assuming a 12-hr OH radical concentration of 1.5E-6 molecules/cm3) indicates that γ-butyrolactone (GBL) reacts with OH-radicals in the atmosphere and degrades quickly. An estimated atmospheric OH rate constant of 2.3 E-12 cm3/molecule-sec and estimated half-life of 4.5 days (ISP, 2009) indicates that GBL reacts with OH-radicals in the atmosphere and degrades slowly. Irradiation of GBL with the 253.7 nm line of a Hg resonance lamp resulted in the following degradation products: allyl formate, succinaldehyde, cyclopropane, carbon dioxide, carbon monoxide, ethylene, propylene (Simonaitis, 1968).
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