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EC number: 603-923-2 | CAS number: 135590-91-9
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 28 Jun - 09 Aug 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: Municipal sewage treatment plant at Frankfurt-Sindlingen
- Type of inoculum : Centrifuged sediment from activated sludge was washed, centrifuged again and re-suspended
- Pre-conditioning : Aeration for 7 days in order to use up the carbon in the activated sludge - Duration of test (contact time):
- 42 d
- Initial conc.:
- 28.1 - 32.5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium:
Amount used : 3.3 ml/L activated sludge suspension with 8 g/L of the centrifuged sediment. The suspension contained 6.3 g/L dry matter, equivalent to 21 mg/L dry matter in the final volume of the test batch
State of acclimatisation : not acclimatised to the test substance or reference substance
TEST SYSTEM
- Reaction vessels: 5-1 glass flasks with magnetic stirrers into which CO2-free air was conducted. The outgoing air was conducted via three traps each filled with 100 ml 0.0125 m Ba(OH)2 to collect the CO2 produced.
- Number of culture flasks/concentration: 2
- Sampling: 25 ml samples from the CO2 traps for titration
- Analyses: titration of the unused barium hydroxide, calculation of the trapped CO2 and calculation of the amount of carbon released from the test material per test vessel.
SAMPLING
- Sampling frequency: on days 3, 7, 10, 14, 17, 21, 24, 28, 35, 41 and 42
CONTROL AND BLANK SYSTEM
- Inoculum blank: 2
- Abiotic sterile control: no
- Toxicity control: no
- Other: reference substance, 2 - Reference substance:
- benzoic acid, sodium salt
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 0.8
- Sampling time:
- 21 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 0.2
- Sampling time:
- 28 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 2.5
- Sampling time:
- 42 d
- Results with reference substance:
- 84% degradation after 17 d
Reference
Findings:
The release of carbon dioxide remained below 20% of the theoretical maximum at the end of the total test period of 42 days.Therefore no significant biodegradation was observed as for most pesticides.
Conclusion:
Testing of Hoe 107892 in the modified Sturm test showed that this substance is not readily biodegradable
in accordance with the definition given in the OECD Guidelines for the Testing of Chemicals. Significant
biodegradation was not observed. The release of CO2 remained below 20% of the theoretical maximum during the prolonged test period of 42 days.
Description of key information
The substance is not readily biodegradable according to OECD criteria.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
- Type of water:
- freshwater
Additional information
The ready biodegradability of the substance was tested in a GLP guideline study following OECD guideline 301B. Domestic, activated sludge (non-adapted) was used as incoculum. A degradation rate of 0.2% was determined after 28 days. The test period was prolonged to 42 days. At the end of the test period a degradation rate of 2.5% was reported.
Based on the results of the available test the substance is considered not readily biodegradable according to OECD criteria.
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