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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 908-749-3 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
In conclusion, the reaction mass of magnesium carbonate and magnesium hydroxide and
magnesium oxide and magnesium peroxide was not toxic to waste water (activated sludge) bacteria at or below a loading rate of 30 mg/L.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 120 mg/L
Additional information
An activated sludge respiration inhibition test was carried out according to OECD guideline 209 and GLP. The reaction mass of magnesium carbonate and magnesium hydroxide and magnesium oxide and magnesium peroxide was administered to the test system at concentrations of 0, 10, 30, 100, 300 and 1000 mg/L.
No statistically significant inhibition of the respiration rate of the sludge was recorded at or below a loading rate of 30 mg/L of the reaction mass of magnesium carbonate and magnesium hydroxide and magnesium oxide and magnesium peroxide. At loading rates between 100 and 1000 mg/l the statistical significant inhibitory effect was between 14 and 26%. It can thus be concluded that the reaction mass of magnesium carbonate and magnesium hydroxide and magnesium oxide and magnesium peroxide was not toxic to waste water (activated sludge) bacteria at or below a loading rate of 30 mg/L, and the 3-h NOEC is 30 mg/L. Furthermore, a 3-h EC10 of 120 mg/L and a 3-h EC50 of > 1000 mg/L were determined based on the results of the test.
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.
