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EC number: 231-901-9
CAS number: 7778-39-4
The "added risk" approach is considered
appropriate when deriving PNECs for arsenic because arsenic is a
naturally occurring substance which organisms will have been exposed to
over an evolutionary timescale. This takes account of background
concentrations and the PNEC applies only to the "added"
contribution over and above the background level.
The lowest acute toxicity data of arsenic
acid towards aquatic organisms are the following:
Test duration/ conditions
Fathead minnow (Pimephales promelas)
Eisler R (1988)
Theegala, C. S. (2007)
Algae and other aquatic plants
Chen, F (1994) cited in Lepper P., 2007
Bringmann, G (1976)
Arsenic acid is not
readily biodegradable and has a potential to bioaccumulation.
according to GHS criteria:
Therefore it is
classified as Chronic category 1.
M-Factor is 1, as the lowest observed LC50 is between 0.1 and 1 mg/L.
accrording to Directive 67/548/EEC (DSD) criteria:
for the environment
toxic to aquatic organisms. May cause long-term adverse effects in the
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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