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Diss Factsheets
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EC number: 215-181-3 | CAS number: 1310-58-3
- 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
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Original data are not available.
Data source
Reference
- Reference Type:
- publication
- Title:
- Estimation of the Half-Life of Sodium Hydroxide Aerosol in the Atmosphere.
- Author:
- US EPA
- Year:
- 1 988
- Bibliographic source:
- Memorandum from Dave Guinnup and Richard Scheffe to Timothy Mohin. Office of Air Quality Planning and Standards, Research Triangle Park, North Carolina. May 5, 1988
Materials and methods
- Principles of method if other than guideline:
- No data
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Sodium hydroxide
- EC Number:
- 215-185-5
- EC Name:
- Sodium hydroxide
- Cas Number:
- 1310-73-2
- Molecular formula:
- HNaO
- IUPAC Name:
- sodium hydroxide
Constituent 1
Results and discussion
Any other information on results incl. tables
Sodium hydroxide is very short lived in the atmosphere. Sodium hydroxide released to the atmosphere as an aerosol in solution with water will be neutralized as a result of its reaction with carbon dioxide (US EPA, 1989)*. The principal reaction products are sodium carbonate and water. The atmospheric half life of sodium hydroxide has been estimated at 13 seconds. Based on model calculations, this degradation results in only 0.4% of the NaOH emitted to air remaining in the air at a point 200 metres from the emission point.
*: US EPA (1989): Assessment of sodium hydroxide as a potentially toxic air pollutant. Federal Register, 54, No.9, January 1989. United States Environmental Protection Agency, United States.
Applicant's summary and conclusion
- Conclusions:
- As the hydroxyl ion is the neutralized species, the same reaction will occur with the hydroxyl ion of potassium hydroxide. The formed carbonate salts will be washed out by rain.
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