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Diss Factsheets
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EC number: 950-052-1 | CAS number: -
- 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
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Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to aquatic invertebrates
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 7 days
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Justification for type of information:
- Peer reviewed research for Zr.
Sulphate is not considered sufficiently hazardous to aquatic organisms to contribute to the assessment - Principles of method if other than guideline:
- A one-week toxicity test with young Hyalella, including feeding, was used because 48-h acute tests without food are difficult to conduct with young Hyalella, which swim and stick to the surface if not fed.
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- Most experiments were conducted using atomic absorption standards containing 1 g metal/. For zirconium, this was obtained from Sigma-Aldrich (Oakville, ON, Canada);
- Test organisms (species):
- other aquatic crustacea: Hyalella azteca
- Details on test organisms:
- Hyalella used for toxicity tests originated from Valens Conservation Area (ON, Canada), in 1985.
initial age of the test animals 1 to 11 d at the start of the test - Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 7 d
- Hardness:
- Tap water: dechlorinated Burlington City tap (Lake Ontario, Canada) water (hardness 124 mg/L)
Soft water: 10% tap water and 90% Milli-Qt (Millipore, Bedford, MA, USA) deionized water (hardness 18 mg/L) - Test temperature:
- 24-25 deg C
- pH:
- Tap water: 8.39 (Range 8.09–8.84)
Soft water: 7.39 (Range 6.44–8.52) - Details on test conditions:
- 16:8-h light:dark photoperiod
Tests were conducted in 400 ml of test water in 500-ml polyethylene cups (snap-top specimen containers).
2.5-mg Tetra-Min (Ulrich Baensch, Melle, Germany) fish food flakes were added to each container, followed by addition of 15 young
Hyalella. Test containers were not aerated during the test. An additional 2.5 mg of food was provided midweek. - Duration:
- 7 d
- Dose descriptor:
- LC50
- Effect conc.:
- > 1 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks on result:
- other: soft water
- Duration:
- 7 d
- Dose descriptor:
- LC50
- Effect conc.:
- > 3.15 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks on result:
- other: tap water
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Effect conc.:
- ca. 8 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- other: Calculated for registered substance
- Basis for effect:
- mortality
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The toxicity of zirconium to Hyalella azteca was measured as part of a study measuring the toxicity of 63 metals. Zirconium showed relatively low toxicity with LC50> 1 mg/L in soft water and > 3.15 mg/L in tap water.
The Zr 4+ content of the anhydrous registered substance is 37% suggesting a calculated EC50 8.5 mg/l - Executive summary:
The toxicity of zirconium to Hyalella azteca was measured as part of a study measuring the toxicity of 63 metals. Zirconium showed relatively low toxicity with LC50> 1 mg/L in soft water and > 3.15 mg/L in tap water.
The Zr 4+ content of the anhydrous registered substance is 40% suggesting a calculated EC50 ca 8 mg/l
Reference
Description of key information
The toxicity of zirconium to Hyalella azteca was measured as part of a study measuring the toxicity of 63 metals. Zirconium showed relatively low toxicity with LC50> 1 mg/L in soft water and > 3.15 mg/L in tap water.
The Zr 4+ content of the anhydrous registered substance is 40% suggesting a calculated EC50 ca 8 mg/l
Sulphate is not considered sufficiently hazardous to aquatic organisms to contribute to the assessment
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 8.5 mg/L
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.
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