Registration Dossier
Registration Dossier
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EC number: 231-511-9 | CAS number: 7601-89-0
Endpoint summary
Administrative data
Description of key information
Additional information
Once released to the environment, the physical, chemical and biological processes that affect the fate and transport of perchlorate include dissolution of source material (in the case of solids), advection, dispersion and diffusion, sorption, and biological degradation. When dissolved in soil pore water, groundwater and surface water, perchlorate's limited ability to sorb to mineral surfaces results in migration dominated by the bulk movement of water (advection) and mixing processes (dispersion). In cases where the advective velocity of the migrating water in low, such as within a clay layer in an aquifer, diffusion processes may become important.
As a conclusion, that means that this substance is highly mobile in the environment once dissolved in water and does not typically sorb to soils or sediment particles.
In general because perchlorate is very soluble in water, perchlorate concentrations are highest in surface water and sediments near specific releases, but decline rapidly in anaerobic sediments, provided sufficient substrate availability and lower concentrations of competing anions such as sulfate and nitrate.
Surface soil can be the first medium to receive a "dose" of perchlorate as a contaminant, typically from an explosive device or the open burning of explosives or munitions. Because perchlorate is very soluble, the concentrations in soil will markedly decrease with time as rainfall infiltrates the soil.
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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