Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Diss Factsheets
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: 939-960-9 | CAS number: 39318-32-6
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Endpoint summary
Administrative data
Description of key information
Additional information
Since no data are available on magnesium zirconium oxide, the aquatic toxicity of the substance is evaluated using data for zirconium dioxide (or other zirconium compounds) and magnesium oxide.
Zirconium dioxide was found not to be toxic or harmful to fish and aquatic invertebrates. The available reliable studies did not report any acute adverse effects (mortality in fish, immobilisation in daphnids) up to and including the limit test concentration of 100 mg/L. Adverse effects on algal growth were observed for several zirconium substances (e.g., zirconium basic carbonate, zirconium dichloride oxide, and a reaction mass of zirconium dioxide and cerium dioxide). However, phosphate monitoring during the tests indicated that the observed effects were concurrent with phosphate depletion. Therefore, the observed effects were described as being due to phosphate deprivation. No evidence has been found for direct toxic effects in algae upon exposure to zirconium compounds. Moreover, the EC50 values of all tests were > 100 mg/L, consequently, zirconium dioxide should not be considered as harmful to algae.
To demonstrate the validity of the read across assumption, i.e. that the addition of magnesium (oxide) to the crystal lattice of zirconium dioxide does not alter the unhazardous character of zirconium dioxide, data for magnesium oxide were added to the dossier for the basic toxicological endpoints acute toxicity to aquatic invertebrates and toxicity to aquatic algae (Annex VII ecotoxicological endpoints). Hereto, data from studies performed with magnesium hydroxide were used, which are considered relevant for magnesium oxide because in contact with water magnesium oxide will give rise to the formation of magnesium hydroxide. In these studies, no LC50 values < 100 mg/L were obtained, hence magnesium hydroxide and magnesium oxide should not be considered as harmful to aquatic organisms.
Consequently, taking into account all abovementioned information, magnesium zirconium oxide can be concluded to be not toxic or harmful to aquatic organisms either.
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.