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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Ammonia does not bioaccumulate and is a product of normal metabolism.

Key value for chemical safety assessment

Additional information

Ammonia is ubiquitous in the aquatic environment as a consequence of the breakdown of plant and animal material and due to animal excretory processes. The generation of ammonia by normal metabolism (protein catabolism) occurs in all animal species, and therefore all animal species have developed effective physiological mechanisms of detoxification (metabolism to other nitrogenous compounds) or excretion. In fresh water fish, ammonia is excreted across the branchial epithelium via passive diffusion.