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EC number: 231-970-5 | CAS number: 7782-91-4
- 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
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Read-across approach
There are no ecotoxicological data available for Molybdic acid. In the assessment of the ecotoxicity of Molybdic acid, read-across from data for the molybdate ion is used. This read-across strategy is based upon the assumption that upon release to the environment and dissolution in aqueous media, Molybdic acid will dissociate and only be present in its dissociated form, i.e. as molybdate and hydrogen ions.
For most metal-containing compounds, it is the potentially bioavailable metal ion that is liberated (in greater or lesser amounts) upon contact with water that is the moiety of ecotoxicological concern. The solubility of Molybdic acid in water is 675.5 mg substance/L and is above the range of effects concentrations for dissolved molybdenum in the aquatic environment (lowest acute and chronic effect values for freshwater organisms: LC50 of 131 mg Mo/L and EC10 of 43.2 mg Mo/L, respectively). Therefore ecotoxicity data for soluble molybdenum salts can be directly used in a read-across approach for Molybdic acid.
Acute toxicity data for Molybdate ion (only most sensitive species per trophic level):
Trophic level | Endpoint | Value |
Fish | 96-h LC50 |
609 mg Mo/L (Pimephales promelas) |
Aquatic invertebrates | 48 -h EC50 | 131 mg Mo/L (Daphnia magna) |
Algae | 72 -h ErC50 | 333 mg Mo/L (Pseudokirchneriella subcapitata) |
Conclusion on classification
Molybdic acid will dissociate into molybdate and hydrogen ions after dissolution in water and hence can be regarded as a mixture of both constituent ions. In the absence of toxicity data for Molybdic acid, its classification for environmental hazards is based on the classification of molybdate ion. Molybdate ion is not classified as hazardous to the aquatic environment. Therefore, it is concluded that Molybdic acid is not classified as hazardous to the aquatic environment.
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