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EC number: 231-843-4
CAS number: 7758-94-3
A formal PBT assessment should not apply as the submission item is
inorganic. Therefore true degradation or mineralisation is not possible.
Nonetheless there are reasons to assume the submission item treatable as
if readily/rapidly biodegradable.
Based on experimental BCF data a metal-typical inverse relationship was
established between the water concentrations of dissolved iron and the
corresponding BCF in freshwater fish (300 to 2 L/kg).
The existing information suggests not only that iron does not
biomagnify, but rather that it tends to exhibit biodilution at higher
trophic levels in the food chain. This is considered a result of metal
regulation by the organisms.
Iron is a naturally occurring element which is in equilibrium between
bound and bioavailable forms in waters, sediments and soils. Additional
emissions integrate eventually to permanent sinks due to integration in
the soil and sediment matrix. Iron is the forth-most abundant element in
the Earth's crust (ca. 5 % by mass, see chapter on environmental fate
and pathways). It is biologically essential and is actively taken up by
organisms. Although the metal is widely distributed in the environment
no accumulation in food chains of aquatic or terrestrial wildlife biota
is described in the literature.
There is convincing evidence that chronic ecotoxicological threshold
level of iron is clearly > 0.01 mg/L (> 10 µg/L). The natural background
concentration is 66 µg iron species/L fresh water. The environmental
bioavailability depends on local geochemical conditions rather than
emissions and acclimation/adaptation of local biota is a natural process.
Due to absence of PBT/vPvB properties the routes of exposure are of
little relevance. Iron speciates once released readily and rapidly into
naturally occurring forms, which are omnipresent in the environment.
Thus humans and environmental organisms are exposed via the media water,
sediment, suspended matter, soil and air.
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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