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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
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EC number: - | CAS number: -
- 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
- Endpoint:
- toxicity to soil microorganisms
- Type of information:
- migrated information: read-across based on grouping of substances (category approach)
- Adequacy of study:
- supporting study
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: No guideline followed. No details on test conditions.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 978
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Deviations:
- not applicable
- Principles of method if other than guideline:
- nitrification test
- GLP compliance:
- no
Test material
- Details on test material:
- - test material Na2B4O7
- Fisher certified reagent-grade chemicals
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test substrate
- Vehicle:
- no
- Details on preparation and application of test substrate:
- The test compound was added in solution to the soil (dropwise, without mixing). Ammonium sulfate was added as a substrate
Test organisms
- Test organisms (inoculum):
- soil
Study design
- Total exposure duration:
- 10 d
Test conditions
- Test temperature:
- 30°C
- Moisture:
- +/- 60% of WHC
- Details on test conditions:
- TEST SYSTEM
- Test container (type, material, size): 250ml franch square bottle, stoppered and incubated at 30°C. Aerated every 2 days by flushing the bottle with air
- Amount of soil: 10g
SOURCE AND PROPERTIES OF SUBSTRATE (if soil)
3 natural surface soils from USA:
- Depth of sampling: surface: 0-15 cm
- pH water (1:2.5):
- Webster: 5.8
- Harps: 7.8
- Okoboji: 7.4
- clay:
- Webster: 23%
- Harps: 30%
- Okoboji: 34%
- silt:
- Webster: 39%
- Harps: 44%
- Okoboji: 50%
- sand:
- Webster: 38%
- Harps: 26%
- Okoboji: 16%
- Pretreatment of soil: air dried and crushed through 2mm screen
After 10 days incubation, the inorganic N content of the soil was measured.
All experiments were done in duplicate. - Nominal and measured concentrations:
- control and one nominal dose was tested (54.1 mg B/kg dw).
- Reference substance (positive control):
- no
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 10 d
- Dose descriptor:
- other: EC92
- Effect conc.:
- 54.1 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks:
- B
- Basis for effect:
- nitrate formation rate
- Remarks:
- (nitrification)
- Remarks on result:
- other: Webster soil
- Duration:
- 10 d
- Dose descriptor:
- other: EC74
- Effect conc.:
- 54.1 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks:
- B
- Basis for effect:
- nitrate formation rate
- Remarks:
- (nitrification)
- Remarks on result:
- other: Harps soil
- Duration:
- 10 d
- Dose descriptor:
- other: EC74
- Effect conc.:
- 54.1 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Remarks:
- B
- Basis for effect:
- nitrate formation rate
- Remarks:
- (nitrification)
- Remarks on result:
- other: Okoboji soil
- Details on results:
- inhibition of nitrification at 54.1 mg B/kg dw compared to control varied between 74 and 92% among soils.
- Reported statistics and error estimates:
- no statistics were reported on difference in nitrification between control and B amended treatments.Only the % inhibition compared to control treatment was calculated for single dose tested. The NOEC/LOEC values were derived based on a 10% inhibition treshold.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not specified
- Conclusions:
- This study was considered unreliable because it does not follow standard guidelines, only 1 dose was tested and there is no information on replicates of Boron treatments. Results for the Okoboji soil are not considered because the clay content is above the 10-90th percentile bounderies for the EU.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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