Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Since the study substance has no hydrolyzable groups, hydrolysis does not contribute to the removal of mono-, and di-(sec-hexadecyl)naphthalene from the environment. Although the study substance has the potential to photodegrade in air at a relatively rapid rate (1.78 hour half-life based on 12-hour day), they are relatively non-volatile and partitions minimally (0.05%) into the air compartment. For these reasons, photodegradation in air does not play any significant role in the removal of the study substance from the environment. Other abiotic processes like phototransformation pathways in surface water, sediment and soil are also not likely to contribute to the overall removal of mono-, and di-(sec-hexadecyl)naphthalene from the environment. This is due to the fact that the study substance does not absorb UV/visible light in the 290-750 nm wavelength range.  

In summary, biodegradation processes are the major contributors to the overall removal of mono-, and di-(sec-hexadecyl)naphthalene from the environment. The study substance has been shown to be very extensively biodegraded (>60%) in freshwater using standard OECD test guidelines and based on these data, it is expected to be rapidly and extensively biodegraded in other compartments like soil, sediment and surface water.