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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
Endpoint summary
Administrative data
Description of key information
Key value for chemical safety assessment
Acute toxicity: via oral route
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
Acute toxicity: via inhalation route
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
Acute toxicity: via dermal route
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
Additional information
No acute toxicity studies with molybdic acid are available, thus the acute toxicity was addressed with existing data on molybdenum compounds. Experimental investigations in laboratory animals on acute toxicity after oral, dermal or inhalation exposure are available for a number of soluble and moderately soluble molybdenum substances, including molybdenum trioxide, sodium molybdate, ammonium dimolybdate and roasted molybdenite concentrate.
Summary of acute toxicity data of Molybdenum substances:
Disodium molybdate (CAS#7631 -95 -0) | Diammonium dimolybdate (CAS#27546 -07 -2) | Molybdenum trioxide (CAS#1313 -27 -5) | Molybdenum sulfide (MoS2), roasted (CAS#86089 -09 -0) | |
Acute oral toxicity | LD50(rat, male)=4040 mg/kg bwLD50(rat, female)=4461 mg/kg bw | LD50(rat, male)=3884 mg/kg bwLD50(rat, female)=3883 mg/kgbw | LD50(rat, male)=2689 mg/kg bwLD50(rat, female)=3830 mg/kg bw | LD50>5000 mg/kg bw |
Acute dermal toxicity | LD50>2000 mg/kg bw | LD50>2000 mg/kg bw | LD50>2000mg/kg bw | LD50>2000 mg/kg bw |
Acute inhalation toxicity | LC50>1.93 mg/L (max attainable concentration) | LC50>2.08 mg/L (max attainable concentration) | LC50>5.84 mg/L (highest concentration required by guideline) | LC50>3.92 mg/L ( max attainable concentration) |
All available acute oral LD50 (covering a large range of solubilities and valencies) are in excess of 2,000 mg/kg. Given that it has been shown for all molybdenum substance groups that the only species formed upon contact with aqueous media is the molybdate anion, read-across among all molybdenum substances is considered justified without restriction. In consequence, no classification is required for acute oral toxicity as well as for specific target organ toxicity, single exposure.
Regarding acute dermal toxicity, the LD50 of soluble and moderately soluble molybdenum substances was determined to be larger than the limit test dose of 2000 mg/kg in all tests. In consequence, no classification is required for acute dermal toxicity as well as for specific target organ toxicity, single exposure.
In acute inhalation toxicity studies, there was a complete absence of mortalities in all studies covering the range of soluble and moderately soluble molybdenum substances. Correspondingly, the LC50(4h) for all tested substances was either above the maximum attainable test concentration or the limit test concentration. As a consequence, no classification for acute inhalation toxicity as well as for specific target organ toxicity, single exposure is required for molybdic acid.
Justification for selection of acute toxicity – oral endpoint
Read-across information.
Justification for selection of acute toxicity – inhalation endpoint
Read-across information.
Justification for selection of acute toxicity – dermal endpoint
Read-across information.
Justification for classification or non-classification
Based on the classification criteria laid down in Regulation (EC) No 1272/2008, molybdic acid does not require classification for acute toxicity as well as for specific target organ toxicity, single exposure. This conclusion is based on standard experimental investigations in laboratory animals with other molybdenum compounds.
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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