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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Phototransformation in air

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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).