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EC number: 238-687-6 | CAS number: 14639-97-5
- 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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Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Acute toxicity to algae:
Good quality and relevant acute toxicity data are available for 5 species. After checking and updating the data base, the data are normalized towards pH 6 and 8 and towards realistic worst-case conditions for DOC (2 mg/L) and a water hardness of 40 mg Ca/L. If several data points were available on a same species, the geomean of the normalized values was calculated and used for the analysis.
Key data (lowest geomean EC50 values) are:
- pH 6: 0.308 mg Zn/L for Pseudokircherniella subcapitata (= Selenastrum capricornutum)
- pH 8: 0.041 mg Zn/L for Pseudokircherniella subcapitata (= Selenastrum capricornutum)
Chronic toxicity to algae:
chronic toxictiy to freshwater algae: lowest NOEC 0.024 mg Zn/l (Pseudokircherniella subcapitata
=Selenastrum capricornutum; geomean of 51 data)
chronic toxicity to marine algae: 6 species available which NOECs range between 0.0855 (Nitzschia
closterium) and 0.45 (Phaeocystis antarctica) mg/l (dissolved concentrations)
Key value for chemical safety assessment
Additional information
Acute freshwater toxicity tests of high quality and relevancy performed according to standard protocol. Information is available for 5 species. The lowest geomean IC50 value after normalisation to pH 6 and 8 is taken as reference value for classification for acute effect at low and high pH.
Chronic freshwater toxicity tests of high quality and relevancy according to standard protocol or equivalent. Chronic toxicity data were retrieved for 4 different freshwater alga species, 2 different green algae, 2 diatoms In addition, toxicity data for 1 cyanobacteria has been retrieved.
For the green alga Pseudokirchneriella subcapitata, non-normalised 72 h chronic toxicity values for the endpoint growth rate varied between 4.9 and 131 µg Zn/L. For the tropical Chlorella sp. 48 h EC10 varied between 22.9 and 646 µg Zn/L for the endpoint growth rate. Toxicity data for 2 different freshwater diatoms, i.e., Planothidium lanceolatum and Navicula pelliculosa, revealed 72 h EC10 (endpoint growth rate) values of respectively 234 µg Zn/L and of 280 µg Zn/L. A chronic toxicity value of 1000 µg Zn/L was noted for the cyanobacteria Microcystis aeruginosa.
Chronic seawater tests of high quality and relevancy according to standard protocol or equivalent. Chronic toxicity data were retrieved for 6 different marine micro-alga species, i.e., Conticriba weissflogii, Cryothecomonas armigera, Nitzschia Closterium, Phaeocystis Antarctica, Pleurochrysis roscoffensis and Thalassiosira pseudonana. Chronic toxicity data for marine algae (for the endpoint growth) varied between 85.5 µg Zn/L for Nitzschia closterium and 450 µg Zn/L for Phaeocystis antarctica.
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.
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