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EC number: 232-108-0 | CAS number: 7787-32-8
- 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
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Barium fluoride will dissociate in aqueous solution to form barium and fluoride ions. Reliable toxicity data on micro-organisms are available for barium and fluoride. Regarding toxic effects of dissolved Ba, 3h-IC50 and 3h-NOEC values of >622 and ≥622 mg Ba/L, respectively, were determined by Egeler and Kiefer (2010) corresponding to the 3h-IC50 and 3h-NOEC values of >794 and ≥794 mg BaF2/L.
For fluoride an EC10 of 510 mg/L was observed in an activated sludge test which would correspond to 2353 mg BaF2/L. When comparing the effect levels of Ba and F, it can be concluded that the toxicity to micro-organisms is driven by barium resulting in a 3h-NOEC of 794 mg BaF2/L.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 794 mg/L
Additional information
For barium fluoride no data on toxicity to micro-organisms are available. As barium fluoride in water rapidly dissociates into barium and fluoride ions, it is these ions that are expected to be present in the environment and which will therefore be assessed. Reliable toxicity data on micro-organisms are available for barium and fluoride ions.
Barium
A GLP-compliant OECD guideline 209 study is available for barium (Egeler et al., 2010). In this 3 -hour respiration inhibition test, activated sludge (from a municipal sewage treatment plant receiving predominantly domestic sewage) was exposed to barium chloride concentrations of up to 1000 mg/L.An inhibition of the respiration rate was not observed at the highest tested concentration. The 3h-IC50 and 3h-NOEC amount to >622 and ≥622 mg Ba/L,based on total measured barium, corresponding to a 3h-IC50 and 3h-NOEC of >794 and ≥794 mg BaF/L, respectively.
Fluoride
In the EU Risk Assessment Report for hydrogen fluoride several studies with micro-organisms are reported (EU-RAR, 2001). The long-term NOEC-values for microorganisms range from 7.1 to 510 mg/L. In the EU-RAR it is concluded that only the results of an activated sludge test (3h-EC10 value of 510 mg fluoride/L) and a test on Pseudomonas putida (NOEC of 231 mg fluoride/L) can theoretically be used for deriving a PNEC for microorganisms. As the EC10 -value of 510 mg fluoride/L from the activated sludge test brings about the lowest PNEC, this study is concluded to be critical. As no new data have become available since the EU-RAR, this value is used for this substance evaluation.
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