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EC number: 235-231-8 | CAS number: 12136-78-6
- 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
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Relevant and reliable data that could be used for the determination of a PNEC for the freshwater environment - using the statistical extrapolation method - were retrieved for 5 different species: the rotifer Brachionus calyciflorus, the cladocerans Daphnia magna and Ceriodaphnia dubia, the amphipod Hyalella azteca and the midge Chironomus riparius. Test results were obtained in experiments that followed international accepted guidance, and were based on measured levels of dissolved molybdenum. Values were 193.6 mg Mo/L, 89.5 mg Mo/L, 63.0 mg Mo/L, 44.6 mg Mo/L and 121.4 mg Mo/L, respectively.
Key value for chemical safety assessment
Additional information
Freshwater compartment
For the rotifer Brachionus calyciflorus the 48h-EC10 value of 193.6 mg/L is retained for the derivation of a predicted no-effect concentration for molybdenum (De Schamphelaere et al, 2008). EC10 values are preferred over NOEC values as the latter are test design-dependent values. In this specific case the 48h-EC10 is even more sensitive than the 48h-NOEC of 244 mg/L.
For Ceriodaphnia dubia two reliable studies were identified: GEI (2009) and De Schamphelaere et al (2008). K1-values were available for two endpoints, with reproduction being more sensitive than survival. The geometric mean of both studies, 63.0 mg Mo/L, was selected for the derivation of a predicted no effect concentration of molybdenum.
For the midge Chironomus riparius the 14d-EC10 value of 121.4 mg/L is retained for the derivation of a PNEC for molybdenum (De Schamphelaere et al, 2008). EC10 values are preferred over NOEC values as the latter are test design-dependent values. In this specific case the 14d-EC10 is more sensitive than the 14d-NOEC of 393 mg/L.
For the cladoceran Daphnia magna there were three studies that provided K1 effects data: GEI (2009), Rodriguez (2007) and De Schamphelaere et al (2008a). Each of these studies reported 21d-EC10 values based on reproduction. The geometric mean of 89.5 mg/L that is derived with these three values (62.8, 105.6, 108 mg Mo/L) is put forward for D. magna for the derivation of a PNEC for molybdenum.
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