Registration Dossier
Registration Dossier
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EC number: 932-833-9 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
Partition coefficient: -0.2 to -1.8 (read-across from citric acid)
Key value for chemical safety assessment
Additional information
The requirement to conduct a log Kow study for the substance as a whole was waived because there are sufficient data for the constituents. The substance is expected to dissociate to citrate, iron and ammonium in the environment. Log Kow is not relevant for iron and ammonium ions as they are inorganics.
A number of studies are available that indicate that citric acid/citrate has a low log Kow. Secondary sources to which reliability could not be assigned gave values of -1.64 and -1.76. Reliable studies conducted according to generally accepted scientific principles gave values in the range -1.6 to -1.8 (Kuban 1991), and -0.76±0.10 for H2A- and -0.21±0.11 for H3A were determined (Avdeef 1992). There is some variation in the results but this is not considered critical for a substance with very low log Kow. No information on pH is given in the sources
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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