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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
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Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Data that were retrieved, suggest that molybdenum bioconcentration through the food chain is negligible: whole body internal concentrations remain below 1 mg/kg at concentration levels up to several mg/L. Reported whole-body BAFs vary more than 2 orders of magnitude, but there is a distinct inverse relationship between exposure concentration and BAF, i.e., decreasing BAFs with increasing Mo-levels in the water column.
Key value for chemical safety assessment
Additional information
Regardless of the exposure concentration, Mo-levels in livers of fish ranged from <0,019 to 14.9 mg/kg wet weight , with a median value of 0.45 mg/kg wet weight, and a 90thpercentile of 1.71 mg/kg wet weight. Mo-levels in muscle samples were markedly lower, i.e., ranging from 0.01 to 7.59 mg/kg wet weight, with a median value of 0.043 mg/kg wet weight, and a 90thpercentile of 0.924 mg/kg wet weight. Median Mo-level in the muscle tissue is one order of magnitude lower than the median Mo-level in liver samples.
The current data set comprises around thirty values that represent whole body Mo-levels in fish (based on wet weight). Values are situated between 0.012 and 14.3 mg/kg wet weight, with a median Mo-concentration of 0.22 mg/kg wet weight. Few values below detection limit were not included as the detection limit of <0.5 mg/kg wet weight was greater than the median value. Assuming that levels in these fish were equal to 0.5 mg/kg wet weight, a median value of 0.31 mg/kg wet weight is obtained. The 90thpercentile of Mo-concentration in whole body samples was 3.00 mg/kg wet weight.
Median levels for other organs like bone, brain, intestines, kidneys, skin, spleen and stomach, were 0.185, 0.028, 0.064, 0.1184, 0.071, 0.092 and 0.041 mg/kg wet weight, respectively. For the gill only few data points were identified, ranging from 0,016 to 5.94 mg/kg wet weight.
Limited information on transfer of Mo through the food chain indicates that molybdenum does not biomagnify in aquatic food chains.
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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