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Diss Factsheets
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EC number: 233-401-6 | CAS number: 10141-00-1
- 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
Toxicity to terrestrial plants
Administrative data
- Endpoint:
- toxicity to terrestrial plants: long-term
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 1993-1995
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Limited information provided.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 998
Materials and methods
Test guideline
- Guideline:
- other: not mentioned
- Principles of method if other than guideline:
- A field study using cotton was conducted on a Lucy loamy sand from 1993 to 1995. Sources of applied sulfur were ammonium sulfate, elemental S, potassium sulfate, potassium magnesium sulfate and potassium thiosulfate. Rates of applied S were 0, 10, 20 and 40 lb/acre. All sources at each rate were preplant broadcast applications. All treatments received total annual applications of 90 lb N/acre, 60 lb PO5/acre, and 140 lb K2O/acre.
Upper-most mature cotton leaves were collected at early bloom for S analysis.
Seed cotton yields were determined at maturity by machine harvesting the two center rows from each plot.
Fiber properties evaluated included micronaire, lenght, lenght uniformity, strenght, elongation, trash uniformity and color. Prior to testing, soil samples were taken to determine background levels of extractable S. - GLP compliance:
- not specified
Test material
- Reference substance name:
- 231-195-5
- IUPAC Name:
- 231-195-5
- Test material form:
- solid: crystalline
- Details on test material:
- - Name of test material (as cited in study report): Potassium Sulfate
- Molecular formula (if other than submission substance): K2SO4
- Molecular weight (if other than submission substance): 174.3
- Smiles notation (if other than submission substance): kos(=o)(=o)ok
- Substance type: inorganic
- Physical state: solid
- Analytical purity: 99.99%
Constituent 1
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
PHYSICO-CHEMICAL PROPERTIES
- Vapour pressure: negligible
- Water solubility (under test conditions): 120 g/L
- log Pow: not applicable to inorganic salt
- pH dependance on stability: about 7
- Stability in water: the soluble proportion completely dissociates into its constituent ion, which is stable in water
- Stability in light: not applicable to inorganic salts
OTHER PROPERTIES (if relevant for this endpoint)
- Biodegradability: biodegradation tests are not applicable to inorganic salts.
Test organisms
- Species:
- other: Cotton plant
- Plant group:
- Dicotyledonae (dicots)
Study design
- Study type:
- field study
- Total exposure duration:
- 24 mo
Test conditions
- Details on test conditions:
- A field study using cotton was conducted on a Lucy loamy sand from 1993 to 1995. Sources of applied sulfur were ammonium sulfate, elemental S, potassium sulfate, potassium magnesium sulfate, and potassium thiosulfate. Rates of applied S were 0, 10, 20, and 40 lb/acre. All sources at each rate were preplant broadcast applications. All treatments received total annual applications of 90 lb N/acre, 60 lb PO5/acre, and 140 lb K2O/acre. Upper-most mature cotton leaves were collected at early bloom for S analysis. Seed cotton yields were determined at maturity by machine harvesting the two center rows from each plot. Fiber properties evaluated included micronaire, length, length uniformity, strength, elongation, trash uniformity, and color. Prior to testing, soil samples were taken to determine background levels of extractable S.
Results and discussion
Effect concentrations
- Duration:
- 24 mo
- Dose descriptor:
- other: no data
- Effect conc.:
- other: no data
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- not specified
- Remarks on result:
- other: No data available
- Details on results:
- Lint yields were increased by the rate of S, but were not affected by the source of S, the time of S application, or the interaction between source and rate. Applying 20 lb S/acre increased lint yields by an average of 15 to 26% depending on the year. A linear response to S rate in 1994 was attributed to the high rainfall received in July and a probably leaching of some of the applied S in this sandy soil. The quadratic responses observed in 1993 and 1995 were probably attributed to drought conditions. Potassium sulfate produced slightly lower yields than ammonium sulfate and potassium magnesium sulfate. In 1995, fiber length was increased slightly the application of S. Fiber length was also affected by the interaction between source and rate, but there were no consistent differences among sources across rates. Concentration of S in cotton leaves collected at mid-bloom increased with the rate of applied S during the study. In 1994 and 1995, there was a significant interaction between rate and time of application for S concentration in leaves. Sulfur applications at early squaring resulted in higher S concentrations than preplant treatments.
Applicant's summary and conclusion
- Conclusions:
- Potassium sulfate produced slightly lower yields than ammonium sulfate and potassium magnesium sulfate.
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