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EC number: 401-680-5 | CAS number: 125304-04-3 TINUVIN 171; TINUVIN 571
- 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 microorganisms
Administrative data
Link to relevant study record(s)
- Endpoint:
- activated sludge respiration inhibition testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13.07. - 22.08.1990
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Comparable to guideline study, none GLP. Instead a centrifuged sludge a settled sludge was used.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: EEC L 133, p. 118-122 (adopted on 30. May 1988 )
- Deviations:
- no
- GLP compliance:
- no
- Analytical monitoring:
- no
- Vehicle:
- no
- Details on test solutions:
- PREPARATION AND APPLICATION OF TEST SOLUTION
- Method: not specified
- Controls: Blank (dechlorinated drinking water) - Test organisms (species):
- activated sludge, domestic
- Details on inoculum:
- - Preparation of inoculum for exposure:
Activated sludge collected from the sewage treatment plant of CH-4153 Reinach, Switzerland on 06/08/90. The preparation was carried out according to the method described in the guideline. The sludge was separated from the aqueous layer by settling instead of centrifugation.
- Initial biomass concentration: The sludge concentration in the test bottles was 1.7 g/L (dry weight). - Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 3 h
- Test temperature:
- 20 °C +/- 2°C during the study
- Nominal and measured concentrations:
- Nominal: 100, 32, 10, 3.2 and 1 mg/L
- Details on test conditions:
- TEST SYSTEM
- Test vessel: 250 mL BOD flasks with gas inlet
- Aeration: no data
- No. of vessels per concentration (replicates): 1
- No. of vessels per control (replicates): 2
- Biomass loading rate: 1.7 g/L (dry weight)
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: dechlorinated drinking water
- Intervals of water quality measurement: Oxygen consumption per hour in mg/L with a ORION - Electrode Type 97-08, ORION Microprocessor lonalizer 901 and plotted on a recorder.
OTHER TEST CONDITIONS
- Adjustment of pH: no
- Photoperiod: test was performed in the dark
EFFECT PARAMETERS MEASURED
The inhibitions were calculated on the basis of the measured time depend oxygen consumption of a Blank and Test solution. - Reference substance (positive control):
- yes
- Remarks:
- 3,5-dichlorophenole
- Duration:
- 3 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth inhibition
- Details on results:
- - Any observations (e.g. precipitation) that might cause a difference between measured and nominal values: no
- Effect concentrations exceeding solubility of substance in test medium: no - Results with reference substance (positive control):
- For the reference substance 3,5-Dichlorophenol an EC 50(3h) rating of 14.6 mg/L was ascertained.
Reference
Description of key information
The inhibition of the degradation activity of activated sludge is not anticipated when introduced to biological treatment plants in appropriate low concentrations.
Key value for chemical safety assessment
Additional information
In a 3-hr acute toxicity study sewage sludge micro-organisms were exposed to the test item at nominal concentrations of 100 mg/L in accordance with OECD 209. The IC50 value based on respiration rate was 100 mg/L after a 3 h contact time. This toxicity study is classified as acceptable and satisfies the guideline requirements for OECD 209 toxicity study.
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