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EC number: 215-127-9 | CAS number: 1304-28-5
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
Barium oxide reacts violently with water to form barium hydroxide according to the chemical equation:
BaO + H2O ----> Ba(OH)2
The hydrolysis of barium oxid is rapid, complete and very exothermic. Barium hydroxide has a water solubility of 49.1 g/L at 25 °C (CRC Handbook of Chemistry and Physics, 88th ed. Boca Raton, FL: CRC Press Inc., 2008) and dissociates in water to form barium and hydroxide ions.
Barium chloride (CAS No. 10361-37-2) has a water solubility of 263/g/L (Kirk-Othmer Encyclopedia of Chemical Technology, 4th ed. Volumes 1: New York, NY. John Wiley and Sons, 1991-Present) and dissociates in water to barium and chloride ions.
The read-across from barium chloride to barium oxide /barium hydroxide is justified on the following basis: both substances are very soluble in water hence bioavailable and both will release Ba 2+ ions.
Therefore, from an ecotoxicity standpoint, the chloride or hydroxide anions are not considered to have any influence on the effective toxicity of Ba2+or any toxicity in their own right, so the anions can be disregarded. Therefore any effect will be related to the Ba2+cation, and the data from ecotoxicity tests conducted with barium chloride and other soluble barium salts are regarded as a suitable surrogate for read-across.
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