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EC number: 202-509-5
CAS number: 96-48-0
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)
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
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