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Diss Factsheets
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EC number: 215-211-5 | CAS number: 1313-82-2
- 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
Additional information
No reliable studies on toxicity of Na2S or NaHS to soil organisms were identified. According to Column 2 of Annex IX of the REACH regulation, these studies do not need to be conducted if direct and indirect exposure of the soil compartment is unlikely. Because all identified uses are industrial indoor processes, no release of the substances to soil is expected. Further, since Na2S and NaHS are not expected to occur as such in soil because of hydrolysis and/or oxidation and/or precipitation processes, no terrestrial toxicty studies can be conducted using the compounds as such. One may consider toxicity of H2S, but H2S formation will only occur under reducing conditions, such as in waterlogged and/or organic-rich soils. Moreover, the dominant process in such soils will be sulfide precipitation, resulting in depletion of any dissolved sulfides present. Also, it must be kept in mind that the organisms present in such soils are often adapted to living in circumstances of fluctuating H2S concentrations. On the other hand, one may consider toxicity of sulfate, because in most soils, any sulfide released will be oxidized to the much less harmful sulfate, which is an essential nutrient for e.g. plants (reference can be made to the OECD SIDS for Na2SO4). However, it was decided only to present this approach for the aquatic compartment (water column) which is considered the most critical compartment for risk characterization.
Finally, no reliable studies on toxicity of Na2S or NaHS to birds were identified. One may consider the mammalian dataset for this, however, because it was demonstrated that sulfide has no potential for bioconcentration/bioaccumulation, it was considered not useful to evaluate secondary poisoning (for which the bird toxicity data are used) and therefore PNEC derivation based on data for mammals nor a testing proposal for toxicity to birds is needed.
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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