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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 232-075-2 | CAS number: 7785-21-9
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
In a 72 hour acute toxicity test, Daphnia carinata were exposed to superphosphate at two different room temperatures. The LC50 values were estimated as:
LC50 (22.7°C): 1790 mg/l
LC50 (30.8°C): 1825 mg/l
Read across justification:
Since magnesium ammonium phosphate dissociates to it's respective ammonium, (magnesium) and phosphate ions, it is considered acceptable to approach the assessment of magnesium ammonium phosphate based on the individual components.
The cations are ubiquitos present in the environment and it is therefore justifiable not to assess the ecotoxicological behaviour of these cations. As a consequence the phosphate ion was considered to be the decisive parameter for the ecotoxicity of the substance.
As superphosphate is very soluble in water the LC50 for acute toxicity to aquatic invertebrates is considered as worst case assumption.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 1 790 mg/L
Additional information
The EC50 of superphosphate in the acute Daphnia magna toxicity test is 1790 mg/L.
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.
