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EC number: 231-106-7 | CAS number: 7439-97-6
- 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
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
On the basis of the EC values from studies with microorganisms, varying from 1.5 (ATP content, Zelles et al, 1985) to 2000 mg/kg d.w. (phosphatase activity, Tyler, 1981) NOEC values in standard soil vary from 1.4 to 2406 mg/kg dw). The lowest NOEC for inorganic mercury in micro-organisms is 1400 µg/kg d.w. (Zelles et al, 1985, standard soil).
Key value for chemical safety assessment
- Long-term EC10 or NOEC for soil microorganisms:
- 1.4 mg/kg soil dw
Additional information
Eight reliable and relevant studies were identified with data from multiple micro-organisms, discussed in the Dutch Basic document for mercury. The influence of inorganic mercury on microbial activity in different soil types was measured (Slooff et al, 1995). Due to the short generation time of microorganisms no selection has taken place based on test duration; results from short-term tests are also considered relevant. Parameters studied were: carbon mineralisation, nitrogen mineralisation, enzyme activities (amylase invertase, phosphatase, urease-, ATP-content and H2-oxydation. The NOEC’s were standardised to values for standard soil for the purposes of PNEC derivation: the NOEC was calculated from the EC values by using an assessment factor of 2 to 10. Natural soils used in ecotoxicological tests differ in characteristics such as organic matter and clay content, soil pH, cation exchange capacity (CEC) and soil moisture content. Natural soil tests can also be used in terrestrial tests, especially in higher tier tests. The results from these natural tests can be converted to a standard soil, which is defined as a soil with an organic matter content of 3.4%
Species |
Trophic level |
Hg-salt |
|
Effect parameter |
Value (mg Hg/kg dry wt) |
Klimisch score |
Reference |
Microorganism |
Microorganisms |
HgCl2 |
Nominal |
3d- NOECrespiration (Sandy loam) 3d- NOECamylase activity (Sandy loam) |
79 79 |
K2 K2 |
Tu, 1988 |
|
Microorganisms |
HgCl2 |
Nominal |
28d- NOECrespiration (Arvada) 28d- NOECrespiration (Bainville) 28d- NOECrespiration (Terry) 6h- NOECrespiration (Arvada) 6h- NOECrespiration (Campspass and bainville) 6h- NOECrespiration (Heldt) 6h- NOECrespiration (Terry) |
9 99 124 35 40 208 248 |
K2 K2 K2 K2 K2 K2 K2 |
Landa and Fang, 1978 |
|
Microorganisms |
HgCl2 |
Nominal |
28d- NOECrespiration (Litter) |
12 |
K2 |
Spalding, 1979 |
|
Microorganisms |
HgCl2 |
Nominal |
1d- NOECrespiration (clay) |
31 |
K2 |
Pancholy et al, 1975 |
|
Microorganism |
HgCl2 |
Nominal |
42d- NOECammonification (clay) 42d- NOECnitrification (clay) 42d- NOECammonification (sand) 42d- NOECnitrification (sand) |
6 10 6 10 |
K2 K2 K2 K2 |
Van Faassen, 1973 |
|
Microorganisms |
HgCl2 |
Nominal |
3h- NOECfosfatase activity (spar-mor) |
2406 |
K2 |
Tyler, 1981 |
|
Microorganisms |
HgCl2 |
Nominal |
1,5h- NOECfosfatase activity (alkalic)(Okoboji) |
456 |
K2 |
Juma and Tabatabai, 1977 |
|
Microorganisms |
HgCl2 |
Nominal |
48d- NOECATP-content (agr. soil) |
1.4 |
K2 |
Zelles et al, 1985 |
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