Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Naphthalene is easily biodegradable in water, sediment and soil under aerobic and denitrifying conditions, but generally biotic decomposition failed under anaerobic conditions. The apparently contradictory outcome of Japanese studies (not biodegradable versus readily biodegradable) indicate that standard testing may lack essential biological capacities that are common in nature. From the entirety of empirical and experimental data, the conclusion can be drawn that naphthalene has not any potential for persistence. Naphthalene is assumed to be rapidly biodegradable most of the time, at least inherently biodegradable under less favorable conditions with no tendency to accumulate in the environment. Furthermore, naphthalene is not bioaccumulating, based on BCF values reported in fish to range between about 40 and about 1200.