Registration Dossier
Registration Dossier
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EC number: 215-170-3 | CAS number: 1309-42-8
Sediment toxicity
Administrative data
Link to relevant study record(s)
- Endpoint:
- sediment toxicity: long-term
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Reference
Description of key information
According to Annex X of REACH Regulation 1907/2006, endpoint 9.5.1, column 2, this study only needs to be conducted if the chemical safety assessment indicates the need for further investigation. Reported results on the physico-chemical properties of Magnesium hydroxide show that the substance is only slightly soluble in water (1.78 mg total solids/L at 8.3 pH and 20ºC) and has a low potential to adsorb to sediment (derived sediment-water partition coefficient (Kd) 1.65). Furthermore, Magnesium hydroxide is expected to break down in the environment to water and Magnesium over time. Magnesium is ubiquitous in the environment and is an essential plant and animal nutrient. Magnesium hydroxide is of low acute toxicity to aquatic organisms and does not meet the criteria to be classified as dangerous under the CLP Regulation (EC) No 1272/2008 nor does it meet the criteria to be classified as persistent, bioaccumulative or toxic under the REACH Regulation. Taking into consideration the physico-chemical properties, breakdown pathway, the low acute toxicity to aquatic organisms and the low adsorption to sediment Magnesium hydroxide is not expected to pose a risk to sediment dwelling organisms.
Key value for chemical safety assessment
Additional information
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.
