Registration Dossier
Registration Dossier
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EC number: 932-833-9 | CAS number: -
Biodegradation in soil
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
In accordance with Column 2 of REACH Annex IX, the soil simulation test does not need to be conducted as the chemical safety assessment according to Annex I indicates that these are not necessary.
Citrate is readily biodegradable; therefore, the simulation studies are not necessary. However, a simulation in water and sediment test value of 93 ± 5 % has been determined for citric acid in a test conducted according to OECD 303 A. The observed removal could be due to adsorption and/or degradation.
The concept of biodegradation is not applicable to an inorganic metal salt such as iron. Precipitation and abiotic environmental factors rule degradation/transformation processes of water soluble iron salts in the environment. However, since iron is an essential element, it is also a subject to biological activity and control. Bacterial transformations of iron are extensively studied and basically well-known processes. Iron transformations and the whole iron cycle in the environment is a combination of abiotic and biological processes.
The ammonium and sulfate ions would enter natural nitrogen and sulfur cycles in air, soil and water upon release to the environment. Nitrification and de-nitrification processes occur naturally in streams and rivers, as well as in many secondary sewage treatment processes (WHO, 1986 quoted in OECD 2004).
Ammonium has a critical role in the nitrogen cycle, so that when it is introduced into aquatic systems, it is usually rapidly transformed into other nitrogenous forms (e.g. nitrates and organically bound nitrogen). The major processes include fixation, assimilation, ammonification, nitrification and denitrification (Environment Canada 2001).
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.
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