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EC number: 205-572-7
CAS number: 142-92-7
Ready biodegradability and inherent biodegradability studies are
available for hexyl acetate. In an OECD 301D closed bottle test hexyl
acetate was found to be 66% degraded after 28 days. In a closed bottle
test it is considered that a 14-day window must be passed in order to
conclude that a substance is readily biodegradable. However, no
determination of dissolved oxygen was made until day 7, at which point
42% degradation had already occured. As such, it was considered
necessary to determine if the 14 -day window had been met by statistical
interpolation. A degradation curve indicated that 10% degradation had
been achieved on day 3 and that the 60% pass level had been reached on
day 17. As such, the 14 -day window had been achieved and the substance
can be considered readily biodegradable.
An inherent biodegradability study provides further evidence that the
substance will be rapidly degraded in the environment, as hexyl acetate
was found to be 85% degraded by day 28.
In addition to this, a QSAR estimation of the biodegradation potential
of hexyl acetate was made using Biowin v4.10. All of the modules within
Biowin estimated that the substance would degrade quickly and as such
the model predicted that hexyl acetate would be readily biodegradable.
This indicates that the structure of hexyl acetate is likely to be
available for microbial degradation and as such it can be expected that
thte substance would be rapidly degraded in the environment. It is
likely that biodegradation would proceed by cleavage of the ester group
to yield acetic acid and hexanol. The latter would then be oxidised to
hexanoic acid with subsequent breakdown of the chain via the
Based on the above evidence it is considered that hexyl acetate is
readily biodegradable and will degrade rapidly in the environment.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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