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Diss Factsheets
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EC number: 231-665-7 | CAS number: 7681-38-1
- 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
Sodium hydrogensulfate:
The aquatic effect and risk assessment focuses on the effects due to possible pHchanges related to H+discharges, because of the assumption that the toxicity of ubiquitous Na+and SO42-ions is expected to be negligible compared to the (potential) pHeffect. The high water solubility and very low vapour pressure indicate that NaHSO4will be found practically exclusively in water. Significant emissions or exposure to air are not expected due to the low vapour pressure of NaHSO4. Significant emissions or exposure to the terrestrial environment are similarly not expected either for the industrial uses.
Environmental fate:
When NaHSO4is emitted to wastewater or surface water, sorption to particulate matter and sediment will be negligible. Howevere, the pHmay decrease, depending on the buffer capacity of the water. In general, the buffer capacity prevents minor shifts in acidity or alkalinity in natural waters, because it is regulated by the equilibrium between carbon dioxide (CO2), the bicarbonate ion (HCO3-) and the carbonate ion (CO32-):
CO2+ H2O <-> HCO3-+ H+(pKa1 = 6.35)
HCO3-<-> CO32-+ H+(pKa2 = 10.33)
If the pHis < 6, un-ionised CO2is the predominant species and the first equilibrium reaction is most important for the buffer capacity. At pHvalues of 6-10, the bicarbonate ion (HCO3-) is the predominant species and at pHvalues > 10 the carbonate ion (CO32-) is the predominant species. In the majority of natural waters the pH values are between 6 and 10, thus theNaHSO4concentration and the second equilibrium reaction are most important for the buffer capacity.
Sodium sulfate:
In water, sodium sulfate completely dissociates into sodium and sulfate ions. The ions cannot hydrolyse. In anaerobic environments sulfate is biologically reduced to (hydrogen) sulfide by sulfate reducing bacteria, or incorporated into living organisms as source of sulfur, and thereby included in the natural sulfur cycle. Sodium sulfate is not reactive in aqueous solution at room temperature.
Significant bioconcentration is not expected. Sodium and sulfate ions are essential to all living organisms and their intracellular and extracellular concentrations are actively regulated. Sodium sulfate is not expected to adsorb onto soil and sediment. From Source: SODIUM SULFATE CAS N°: 7757-82-6 OECD SIDS April 2005
Environmental Exposure and Fate.
In anaerobic environments sulfate is biologically reduced to (hydrogen) sulfide by sulfate reducing bacteria, or incorporated into living organisms as source of sulfur. Sodium sulfate is not reactive in aqueous solution at room temperature. In moist air sodium sulfate will take up water (hygroscopic) to form hydrates. Sodium sulfate is also soluble in glycerol, but insoluble in alcohol. Sodium sulfate has no oxidising properties, is not explosive and is non-flammable.
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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