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EC number: 233-469-7 | CAS number: 10192-30-0
- 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)
- Endpoint:
- toxicity to soil microorganisms
- Data waiving:
- other justification
- Justification for data waiving:
- other:
- Endpoint:
- toxicity to soil microorganisms
- Type of information:
- experimental study
- Remarks:
- field study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The authors conducte a 3 year field study and examined the effect of a single ammonium sulphate application on the abundance of nitrogen fixing bacteria in a spanish rice field.
Cyanobacterial population in the soil was measured in cores collected from each plot, at 4–5-weekly intervals throughout the growth cycles, as previously described (Quesada and Fernández Valiente, 1996). Likewise, ‘in situ’ assays of nitrogenase activity (ARA) (Quesada et al., 1989) were performed in four sampling periods, May, June, July and September, every year . At each sampling period, three assay chambers were placed in each plot. - GLP compliance:
- no
- Specific details on test material used for the study:
- No further details on test material provided.
- Analytical monitoring:
- no
- Vehicle:
- no
- Details on preparation and application of test substrate:
- Not specified.
- Test organisms (inoculum):
- soil
- Total exposure duration:
- 36 mo
- Remarks:
- three consecutive crop seasons
- Test temperature:
- Ambient.
- Moisture:
- Flooded Rice fields.
- Details on test conditions:
- The rice fields studied are located in the Eastern Iberian Peninsula, surrounding the coastal lagoon of ‘La Albufera’ near Valencia. Spain.
- Nominal and measured concentrations:
- 0, 17.5, 35, 70, 140 kg N/ha, corresponding to 0, 22.5, 45.1, 90.1, 180.3 kg NH4/ha
- Reference substance (positive control):
- no
- Key result
- Remarks on result:
- other: Applied ammonium sulfate at 17.5, 35, 70, and 140 kg N/ha reduced the abundance of cyanobacteria and the determined nitrogen fixation.
- Remarks:
- Ammonium sulfate treatments of up to 70 kg N/ha caused a moderate increase in grain yield, without severely affecting the N2 fixing ability (less than 50% reduction) or cyanobacteria abundance.
- Details on results:
- A significant negative correlation (r= -0.53; p < 0.05; n= 35) between the abundance of N2-fixing cyanobacteria and amount of N fertilizer applied was observed
Nitrogenase activity decreased linearly as the amount of N fertilizer increased. A significant negative correlation (r= -0.90; p < 0.05; n= 60) between acetylene reducing activity and the amount of N fertilizer was observed. The inhibition was only partial and differences among treatments were only significant (one-way analysis of variance) in two years (1990, 1991). - Reported statistics and error estimates:
- Correlation analysis.
- Validity criteria fulfilled:
- not applicable
- Remarks:
- field study
- Conclusions:
- In a 3-year field study in spanish rice fields, applied ammonium sulfate at 17.5, 35, 70, and 140 kg N/ha reduced the abundance of cyanobacteria and the determined nitrogen fixation, whereas ammonium sulfate treatments of up to 70 kg N/ha caused a moderate increase in grain yield, without showing sever effects on the N2 fixing ability (less than 50% reduction) or cyanobacteria abundance.
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Description of key information
Key value for chemical safety assessment
Additional information
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