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Registration Dossier
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EC number: 247-975-0 | CAS number: 26760-64-5
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The substance 2-methylbut-2-ene (CAS 513-35-9), at a concentration of 2.1 mg/l, was not inhibitory to the normal biodegradation of sodium benzoate by microbial inoculum. The 5 day NOEC is estimated to be > 2.1 mg/l.
Key value for chemical safety assessment
Additional information
One reliable proprietary study, Huntingdon (2004e) is available for the isomer 2-methylbut-2-ene (CAS 513-35-9). 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.
The substance 2-methylbut-2-ene (CAS 513-35-9), at a concentration of 2.1 mg/l, was not inhibitory to the normal biodegradation of sodium benzoate by microbial inoculum. The 5 day NOEC is estimated to be > 2.1 mg/l.
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