Registration Dossier
Registration Dossier
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EC number: 932-833-9 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Citric acid: OECD 301B (CO2 evolution test): 97% in 28 days; OECD 301E ( Modified OECD screening test): 100% in 19 days; OECD 302B (Inherent biodegradability: Zahn-Wellens test): 85% in 14 days
Iron (III): Not relevant (inorganic)
Ammonium: Not relevant (inorganic)
Sulfate: Not relevant (inorganic)
Key value for chemical safety assessment
Additional information
No studies are available for the ready biodegradation of reaction mass of ammonium iron (III) citrate and ammonium sulfate. However, ammonium iron (III) citrate and ammonium sulfate are both expected to dissociate under environmentally relevant conditions (see Section 1.3 of the CSR). Therefore, it is appropriate to read-across data relevant to the ready biodegradation of iron, citrate, ammonium and sulfate. Further details may be found in an expert report (Peter Fisk Associates, 2012) attached in Section 13 of the IUCLID 5 dossier.
Iron (III)
Iron is inorganic; therefore, ready biodegradation testing is not required according to Column 2 of REACH Annex VII.
Citrate
Citric acid is a readily biodegradable substance. None of the available reliable study reports could be assigned as key study due to lack of sufficient information. However, the results are found consistent and reliable for the purpose of environmental assessment of the substance.
Under conditions of defined pH, addition of citric acid to solution is equivalent to addition of the citrate ion.
Ammonium and sulfate
Ammonium and sulfate are inorganic; therefore, ready biodegradation testing is not required according to Column 2 of REACH Annex VII.
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