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Diss Factsheets
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EC number: 231-635-3 | CAS number: 7664-41-7
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- other: Published information (Canadian Environmental Protection Act, 1999
- Adequacy of study:
- weight of evidence
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- Ready biodegradation is typically determined experimentally based on OECD 301 by measurement of either mineralization to carbon dioxide or BOD (biological oxygen demand). The letter is not possible for NH3 since the molecule has no carbon source.
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water: freshwater
- Key result
- Parameter:
- other: When introduced into the aquatic environment, ammonia is rapidly converted into other nitrogenous forms under aerobic conditions.
- Remarks on result:
- not determinable
- Remarks:
- None
- Details on results:
- When introduced into the aquatic environment, ammonia is rapidly converted into other nitrogenous forms under aerobic conditions.
- Executive summary:
Ammonia is environmentally ubiquitous as a consequence of natural degradation processes and animal excretion and has a critical role in the nitrogen cycle. When introduced into the aquatic environment, ammonia is rapidly converted into other nitrogenous forms under aerobic conditions. The major processes include fixation, assimilation, ammonification, nitrification and denitrification. Under aerobic conditions, ammonia in water is rapidly converted into nitrate by nitrification. Bacteria of the genusNitrosomonasoxidise ammonia to nitrite, andNitrobacterconvert the nitrite into nitrate. The pH in water is increased by the presence of ammonia ions, in the form of hydroxide ions. Temperature, oxygen supply and pH of the water are factors in determining the rate of oxidation. Aerobic biological treatment (as utilised in wastewater treatment works) completely nitrifies ammonia to nitrate. Ammonia is assimilated by aquatic algae and macrophytes for use as a nitrogen source.
- Endpoint:
- biodegradation in water: ready biodegradability
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Referenceopen allclose all
Description of key information
Ammonia is intermediate in the aquatic nitrogen cycle and rapidly converted into other nitrogenous forms under aerobic conditions.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Ammonia is environmentally ubiquitous as a consequence of natural degradation processes and animal excretion and has a critical role in the nitrogen cycle. When introduced into the aquatic environment, ammonia is rapidly converted into other nitrogenous forms under aerobic conditions. The major processes include fixation, assimilation, ammonification, nitrification and denitrification. Under aerobic conditions, ammonia in water is rapidly converted into nitrate by nitrification. Bacteria of the genus Nitrosomonas oxidise ammonia to nitrite and Nitrobacter convert the nitrite into nitrate. The pH in water is increased by the presence of ammonia ions, in the form of hydroxide ions. Temperature, oxygen supply and pH of the water are factors in determining the rate of oxidation. Aerobic biological treatment (as utilised in wastewater treatment works) completely nitrifies ammonia to nitrate. Ammonia is assimilated by aquatic algae and macrophytes for use as a nitrogen source.
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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