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Diss Factsheets
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EC number: 232-192-9 | CAS number: 7789-82-4
- 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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Monitoring data
Administrative data
- Endpoint:
- monitoring data
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Reliable ambient monitoring data were collected from various national and international environmental agencies. Methodology and procedures for data analyses were in line with the guidance given by ECHA (European Chermicals Agency) and with the methodology that was followed in exsisting compulsory and voluntary risk assessments for some other metals (e.g., Zn, Cu, Ni, Pb)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- other: ECHA, 2008. RIP 3.2: Guidance on information requirements and chemical safety assessment. Chapter R.16: Environmental Exposure Estimation
- Qualifier:
- according to guideline
- Guideline:
- other: EC, 2003. Technical Guidance Document in support of Commission Directive 93/67/EEC on risk assessment for new notified substances and Commission Regulation (EC) No 1488/94 on risk assessment for existing substances. Part II: Environment.
- GLP compliance:
- no
- Type of measurement:
- other: ambient concentration levels
- Media:
- surface water
Test material
- Reference substance name:
- Molybdenum
- EC Number:
- 231-107-2
- EC Name:
- Molybdenum
- Cas Number:
- 7439-98-7
- Molecular formula:
- Mo
- IUPAC Name:
- molybdenum
- Details on test material:
- no Mo-compounds added to water; determination of ambient levels in the environment
Constituent 1
Results and discussion
- Details on results:
- The regional (EU) ambient reasonable-worst-case concentration of dissolved molybdenum in european surface waters is 2.30 µg/L.
Any other information on results incl. tables
Table 1 gives an overview of the different RWC-ambient PECs that were derived for dissolved and total molybdenum levels. Measured-based reliable values for dissolved molybdenum were obtained for seven countries/areas. Country/area-specific RWC-ambient PEC values were situated between 0.62 μg/L and 5.1 μg/L. For the United Kingdom a value of 2.03 was put forward as the country-specific RWC-ambient PEC. This value is close to the value of 2.27 µg Modiss./L that was found with the data taken from HMS. However, the value of 2.03 µg Modiss./L is based on a larger data set (n=2164 for the rivers that were witheld), and covers relevant water bodies covering different areas in the UK. Therefore this value is proposed as a relevant RWC-ambient PEC for dissolved molybdenum in the United Kingdom.
For total Mo, a RWC-ambient PEC was found for Belgium, Germany and The Netherlands. Application of a factor of difference of 0.91 on the total RWC-ambient PEC that was found for Germany resulted in estimated dissolved RWC-ambient PECs of 1.86 μg/L. This factor of 0.91 is based on the observed difference between the median total and median dissolved Mo-concentration in the river Thames (Neal et al., 2000). This factor of 0.91 is well in line with the total:dissolved ratios of 0.79 and 0.85 that were derived with the total/dissolved RWC-ambient PECs for Belgium and The Netherlands, respectively.
With these data a EU-regional RWC-ambient PEC of 2.30 µg Modiss./L is calculated.
Table 1: Overview of total and dissolved RWC-ambient PEC values for molybdenum in the aquatic compartment
Country/Area | Total RWC-ambient PEC (µg/L) |
Dissolved RWC-ambient PEC (µg/L) |
Belgium - Flanders |
7.6 |
5.1 |
Germany – Elbe – Umweldbundesamt Average: |
2.04 2.10 2.07 |
1.86 |
Finland - Geological Survey of Finland |
0.70 |
|
The Netherlands – Rhine |
2.93, 3.58, 3.58 Mean: 3.36 |
2.85 |
Sweden – SLU dataset – Lake Vettasjärvi – SEPA, 1997 (watercourses) – SEPA, 1997 (lakes) |
0.62 0.45 (supp.data) 0.22 (supp. data) 0.26 (supp.data) |
|
United Kingdom – HMS-database – Neal & Robson, 2000 – Thames – single location |
3.08 |
2.27 (supp. data) 2.03 2.80 (supp. data) |
Granitic waters | 2.96 |
|
France – Seine & Marne |
3.38 |
|
Regional RWC-ambient PEC | 2.30 µg/L (median value) |
Applicant's summary and conclusion
- Conclusions:
- Based on the monitoring data that were collected for different EU-countries, a reliable regional RWC-ambient PEC of 2.30 µg/L has been derived.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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