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Environmental fate & pathways

Endpoint summary

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Description of key information

When CyreneTM is in aqueous solution, the keto group (C=O) gains water (H2O) to form the corresponding Gem Diol {(1S,5R)-6,8-dioxabicyclo[3.2.1]octane-4,4-diol}. An equilibrium is established rapidly (meaning that the reaction is rapidly reversible). The ratio of the two forms is dependent upon the amount of water present.

Further information is available in the attached document in Section 13 for further details.


At concentrations relevant for studies of environmental fate properties, the Gem Diol form predominates and as such the environmental hazard assessment is based on the properties of the Gem Diol.

The submission substance attained 99% biodegradation (DOC removal) in 28 days in a screening test for biodegradation in water (OECD 301A). Since in aqueous media the Gem Diol predominates, the biodegradation observed is also considered to reflect that Gem Diol is readily biodegradable.

Additional information