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Diss Factsheets
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EC number: 700-823-1 | CAS number: 55514-22-2
- 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
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Toxicity to microorganisms
Administrative data
- Endpoint:
- activated sludge respiration inhibition testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed according to GLP and OECD 309 guideline.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 3-[4-(5,6-diphenyl-1,2,4-triazin-3-yl)phenyl]-5,6-diphenyl-1,2,4-triazine
- EC Number:
- 700-823-1
- Cas Number:
- 55514-22-2
- Molecular formula:
- C36H24N6
- IUPAC Name:
- 3-[4-(5,6-diphenyl-1,2,4-triazin-3-yl)phenyl]-5,6-diphenyl-1,2,4-triazine
- Details on test material:
- - Name of test material (as cited in study report): CH0222 WP30
- Substance type: monoconstituent
- Physical state: powder
- Analytical purity: 99.8 %
- Purity test date: January 7th, 2012
- Lot/batch No.: LP140
- Stability under test conditions: stable at room temperature (20 +/- 5 °C) under dark and dry conditions
- Storage condition of test material: see above
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test organisms
- Test organisms (species):
- activated sludge, domestic
- Details on inoculum:
- - Preparation of inoculum for exposure: The activated sludge was used as collected, but coarse particles were removed by sttling for 10 minutes ans then the upper layer decanted.
- Pretreatment: during holding prior to use the sludge was fe daily with 50 mL synthetic sewge (as described in OECD guideline) per litre and kept aerated at room temperature overnight.
- Initial biomass concentration: An aliquot of the final sludge suspension was weighed, dried and the ratio of wet sludge to its dry weight determined. Base on the skudge dry matter, xalculated amounts of wet sludge were suspended in tap water to yield a concentration equivalent to 2.5 g/L on dry weight basis. This level gave a concentration of 1.0 g/L suspended solid in the test medium.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 3 h
Test conditions
- Hardness:
- Medium made up as required in OECD 309
- Test temperature:
- 18 - 20 °C
- pH:
- 7.2
- Dissolved oxygen:
- 8.0 - 8.8 mg O2/L
- Salinity:
- freshwater
- Nominal and measured concentrations:
- 100 mg/L nominal cocentration
- Details on test conditions:
- TEST SYSTEM
- Test vessel: Glass flasks of approximately one litre volume
- Material, size, headspace, fill volume: 500 ml fill volume, flasks tightly capped during test
- Aeration: compressed air
- No. of vessels per concentration (replicates): 3
- No. of vessels per control (replicates): 6
- Biomass loading rate: 200 mL activated sludge suspension / 500 mL
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: tap water
OTHER TEST CONDITIONS
- Adjustment of pH: No
- Photoperiod: No
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
Limit test at 100 mg/L nomibnal concentration (amount directly weighed in assay falsks due to poor water solubility) - Reference substance (positive control):
- yes
- Remarks:
- 3,5-dichlorophenol
Results and discussion
Effect concentrations
- Duration:
- 3 h
- Dose descriptor:
- EC0
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- inhibition of total respiration
- Remarks:
- respiration rate
- Remarks on result:
- other: No effect recorded
- Results with reference substance (positive control):
- - Results with reference substance: valid
- Relevant effect levels:
EC20 = 1.5 mg/L (95% cl 0.0 - 3.3 mg/L)
EC50 = 5.0 mg/L (95% cl 1.6 - 9.1 mg/L) - Reported statistics and error estimates:
- Only for reference substance (refer to results 95% cl), but no effetc at all recorded for WP30.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The 3hour EC10, EC20 and EC50 of WP30 were clearly higher than 100 mg/L. The NOEC was established to be also above 100 mg/L.
- Executive summary:
The influence of WP30 on the activity of activated sludge was evaluated by measuring the respiration rate under conditions defined in the OECD 309 cguideline conditions. The repiration rate (oxygen consumption) of an aerobic activated sludge fed witha standar amount of synthetic sewage was measured in presence of 100 mg/L co,ce,tration of WP30 after a period of incubation of 3 hours.
WP30 was tested in triplicate, reference substance 3,5 -dichlorophenol in triplicate, and inoculum controls were made in 6 replicates.
WP30 was directly weighed into the test vessels. The respiration rates of the activated sludge treated with WP30 at a concentration of 100 mg/L differed by less than 10% from co,trol.
The positive control 3,5 -dichlorophenol was tested in the same way as WP30. The 3hour EC50 was found to be 5.0 mg/L thsu laying in the range of 2 - 25 mg/L recommended by the guideline. This result cofims the suitability of the activated sludge used.
Based on measured inhibition rates, the 3hour EC10, EC20 and EC50 f WP30 could not be quantified because at a nominal concentration of 100 mg/L, less than 10 % inhibition was observed after 3 hours incubation.
The NOEC of WP30 was therefore established to be above 100 mg/L.
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