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EC number: 293-314-4 | CAS number: 91053-49-5 Insoluble substance obtained during dissolution of zinc ores or concentrate in sulfuric acid for the production of zinc sulfate solutions after physical separation such as flotation and filtration.
- 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
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
BAF values are not constant across arsenic concentrations in fresh- and saltwater. BAF values from these studies ranged from 2 to 19,000 and appear to be the highest within the range of ambient arsenic concentrations and decline to relatively low values as arsenic water concentrations increase. The median of freshwater BAF values assuming a log-normal distribution is 270 L/kg wet weight (n=91), and this value was selected for the chemical safety assessment.
Key value for chemical safety assessment
- BCF (aquatic species):
- 270 L/kg ww
Additional information
Summary
Arsenic bioaccumulation depends on various factors, such as environmental setting (marine, estuarine, freshwater), organism type (fish, invertebrate), trophic status within the aquatic food chain, exposure concentrations, and route of uptake. Biomagnification in aquatic food chains does not appear to be significant. Bioconcentration of arsenic occurs in aquatic organisms, primarily in algae and lower invertebrates. An extensive study of the factors affecting bioaccumulation of arsenic in lotic systems found no evidence of biomagnification since arsenic concentrations in organisms tend to decrease with increasing tropic level. Arsenic is mainly accumulated in the exoskeleton of invertebrates and in the livers of fish. No differences were found in the arsenic levels in different species of fish, which included herbivorous, insectivorous, and carnivorous species. The major bioaccumulation transfer is between water and algae, at the base of the food chain and this has a strong impact on the concentration in fish. No differences were found between bottom-feeders and predators in tissue levels of arsenic. BAF values appear to be the highest within the range of ambient arsenic concentrations, and decline steeply to relatively low levels as arsenic concentrations in water increase (according to ATSDR, 2007 and WHO, 2001).
Water:
BAF values are not constant across arsenic concentrations in fresh- and saltwater. BAF values from these studies ranged from 2 to 19,000 and appear to be the highest within the range of ambient arsenic concentrations and decline to relatively low values as arsenic water concentrations increase. Regardless, all BAF values were analysed together in a weight-of-evidence approach for fresh- and saltwater, respectively. The median of freshwater BAF values assuming a log-normal distribution is 270 L/kg wet weight (n=91), and this value was selected for the chemical safety assessment. The median of saltwater BAF values assuming a log-normal distribution is 5866 L/kg wet weight (n=4), and this value was considered for the chemical safety assessment. Biomagnification of arsenic in aquatic food chains does not appear to be significant. On the contrary, the highest BAF values were measured at the lower trophic levels (Tyler et al., 2003).
Sediment:
55 field-measured bioaccumulation data points (BSAFs) were summarised (Anonymous, 1998). The median BSAF value on a dry weight basis for invertebrates was 0.143, indicating that invertebrates in most of the assessed studies did not accumulate arsenic to levels greater than those measured in the associated sediments.The overall median of freshwater BSAF values based on a log-normal distribution is 0.143 dry weight (n=55) and was considered for the chemical safety assessment.
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