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Environmental fate & pathways

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The key study for the biodegradation of 2 -methylbutane (ExxonMobil Chemical 117594A 1996) is a non-GLP study which followed guidelines equivalent to OECD guideline 301F manometric respirometry test. There were some minor deviations in test concentrations from the protocol, however these deviations were shown to not affect the integrity of the study as it meet the validity criteria. The study was therefore deemed suitable for assessment. This study indicates that 2 -methylbutane is readily biodegradable.

Simulation testing was not required as 2 -methylbutane is readily biodegradable.