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EC number: 247-975-0 | CAS number: 26760-64-5
Two reliable proprietary studies for the isomer 2-methylbut-2-ene (CAS 513-35-9) show that the substance is not readily biodegradable. No other reliable studies were identified. Since isoamylene (2-methylbutene, CAS 26760-64-5) is a mixture of the two isomers, 2-methylbut-2-ene (CAS 513-35-9) and 2-methylbut-1-ene (CAS 563-46-2) and in the absence of any reliable data for isoamylene the data for the isomer (CAS 513-35-9) are considered suitable for read-across.
Structural analysis indicates that the substance is not expected to undergo hydrolysis due to the lack of hydrolysable functional groups. Based on a log Kow of 2.67 the substance is not expected to bioaccumulate in the environment or absorb strongly to soil or sediment. Accordingly, the endpoints BCF and Koc can be waived.
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