Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-901-9 | CAS number: 7778-39-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.001 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.001 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.42 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 5 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 6 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.095 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Additional information
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.
Conclusion on classification
The lowest acute toxicity data of arsenic acid towards aquatic organisms are the following:
Species |
Test duration/ conditions |
Endpoint |
Result (mg/L) |
Reference |
Fish |
||||
Fathead minnow (Pimephales promelas) |
96h |
LC50 |
25.6 |
Eisler R (1988) |
Daphnia |
||||
Daphnia pulex |
96h |
LC50 |
3.4 |
Theegala, C. S. (2007) |
Algae and other aquatic plants |
||||
Scenedesmus obliguus |
96h |
EC50 |
0.159 |
Chen, F (1994) cited in Lepper P., 2007 |
Microorganisms |
||||
Pseudomonas putida |
16h |
EC10 |
6.75 |
Bringmann, G (1976) |
Arsenic acid is not readily biodegradable and has a potential to bioaccumulation.
Classification according to GHS criteria:
Therefore it is classified as Chronic category 1.
The corresponding M-Factor is 1, as the lowest observed LC50 is between 0.1 and 1 mg/L.
Classification accrording to Directive 67/548/EEC (DSD) criteria:
N: dangerous for the environment
R50/53: Very toxic to aquatic organisms. May cause long-term adverse effects in the aquatic environment.
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.
