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EC number: 274-958-5 | CAS number: 70865-30-4
- 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: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Version / remarks:
- 1981
- GLP compliance:
- not specified
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - Source of inoculum: mixed population of activated sewage sludge microorganisms from the aeration stage of Severn Trent Water PLC Sewage.
- Preparation of inoculum for exposure: the activated sludge was washed by repeatedly settling and resuspending with the test water.
- Concentration of sludge: equivalent to 750 mg dry weight/l. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 268 mg/L
- Based on:
- test mat.
- Remarks:
- equivalent to 100 ppm of C
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- TEST CONDITIONS
- Agitation: by magnetic stirrers and compressed air via narrow bore glass tubes.
- Test temperature: 24 °C
- pH: pH values did not drop below 5.2 in any culture vessel during the course of the study and were adjusted to pH 7.3 daily.
- Dissolved oxygen: levels remained at approximately 5.7 mg O2/l or above in all cultures at all times.
- Continuous darkness: test was conducted in darkness.
SAMPLING
- Pevention of evaporation: losses by evaporation were made good by the addition of de-ionised water immediately prior to sampling.
- Volume: 20 ml samples were withdrawn from each vessel.
- Sample preparation: samples were filtered through 0.45 µm disposable filters, the first 5 ml was discarded . - Reference substance:
- diethylene glycol
- Parameter:
- % degradation (DOC removal)
- Value:
- 7
- Sampling time:
- 28 d
- Details on results:
- Test item attained 7 % degradation after 28 days and therefore cannot be considered as inherently biodegradable.
The standard material, Digol, attained 100 % degradation after 28 days, thereby confirming the suitability of the inoculum and culture conditions. - Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- Degradation (28d): 7 % based on DOC removal
- Executive summary:
The inherently biodegradability potential of the test substance was assayed in Modified Zahn-Wellens Test, according to the OECD guideline 302B.
Test organisms were a mixed population of activated sewage sludge. Diethylene glycol was used as reference substance.
Test item attained 7 % degradation after 28 days and therefore cannot be considered as inherently biodegradable.
The standard material, Digol, attained 100 % degradation after 28 days, thereby confirming the suitability of the inoculum and culture conditions.
pH values did not drop below 5.2 in any culture vessel during the course of the study and were adjusted to pH 7.3 daily. Dissolved oxygen levels remained at approximately 5.7 mg O2/l or above in all cultures at all times.
Conclusion
Degradation (28d): 7 % based on DOC removal
Reference
Day | DOC value mg/l (mean of 3 replicate) | % of degradation | ||
Test item | Reference substance | Test item | Reference substance | |
0 hr | 111.17 | 89.37 | - | - |
3 hrs | 107.61 | 91.04 | 3 | <2> |
1 | 111.78 | 91.54 | <1>** | <2> |
2 | 113.22 | 63.96 | <2> | 28 |
3 | 112.29 | 40.98 | <1> | 54 |
6 | 100.98 | 13.93 | 9 | 84 |
8 | 112.96 | 6.28 | <2> | 93 |
10 | 102.01 | 0.00 | 8 | 100 |
14 | 119.8 | 0.00 | <8> | 100 |
16 | 115.61 | 0.00 | <4> | 100 |
21 | 96.65 | 0.00 | 13 | 100 |
23 | 107.52 | 0.00 | 3 | 100 |
27 | 102.25 | 0.00 | 8 | 100 |
28 | 103.62 | 0.00 | 7 | 100 |
<increase>
** The increase in % biodegradation is considered to be due to sampling/analytical variation.
Description of key information
Neither readily nor inherently biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The inherently biodegradability potential of the test substance was assayed in Modified Zahn-Wellens Test, according to the OECD guideline 302B. Under test conditions, test item attained 7 % degradation after 28 days and thus cannot be considered as inherently biodegradable. The standard material, Digol, attained 100 % degradation after 28 days, thereby confirming the suitability of the inoculum and culture conditions.
Acid Red 057 is an azo dye, which is not expected to be ready biodegradable because of its chemical structure and its specific function. Commonly, dyes undergo a primary transformation, i.e. discolouration due to the interruption of conjugation. However, the degradation process involves more steps and takes more time.
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