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EC number: 275-139-5 | CAS number: 71032-99-0
- 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:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- From 12th August to 09th September, 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Justification for type of information:
- The test substance is the acid form of the substance under registration; justification for read-across is detailed in the IUCLID section 13.
- Reason / purpose for cross-reference:
- read-across source
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 C (Inherent Biodegradability: Modified MITI Test (II))
- GLP compliance:
- not specified
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - Source: activated sewage was prepared by sampling 10 different sites around the UK, in accordance with OECD guideline 302C.
- Preparation: the mixed sludge was fed daily with a 0.1 % synthetic sewage and maintained on constant aeration at 25 ± 1 °C.
- Initial cell/biomass concentration: equivalent to 100 mg dry weight/l. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 30 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Parameter followed for biodegradation estimation:
- TOC removal
- Details on study design:
- TEST CONDITIONS
- Test temperature: 25 ± 1 °C
- Agitation: bu magnetic stirrers.
- Lighting: the test was carried out in darkness.
OBSERVATIONS
Manometer volumes were recorded daily. - Reference substance:
- aniline
- Remarks:
- 100 mg/l
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0
- Sampling time:
- 28 d
- Parameter:
- % degradation (TOC removal)
- Remarks on result:
- not determinable
- Remarks:
- due to the test material adsorbing to the sludge
- Details on results:
- Test item attained negligable degradation within 28 days calculated from oxygen uptake (% of COD) and therefore, cannot be considered as inherently biodegradable under the strict terms and conditions of the OECD Guidelines.
A COD value of 1.28 mg O2/mg was obtajned for the test material.
TOC analysis of test item was not possible due to the test material adsorbing to the sewage sludge. - Results with reference substance:
- Total organic carbon analysis of the test media at Day 0 and Day 28 showed that Aniline attained 100 % within 28 days.
Aniline attained 73 % after 14 days, thereby confirming the suitability of the inoculum and culture conditions. - Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The substance is not inherently biodegradable.
- Executive summary:
The assessment of the inherently biodegradability potential of the test item was investigated according to the OECD guideline 302C, Modified MITI (II) method. Oxygen consumption was measured by direct manometer reading.
The reference compound, aniline, attained 73 % of degradation after 14 days, confirming the suitability of the inoculum and culture conditions.
Test item attained negligable degradation within 28 days calculated from oxygen uptake (% of COD) and therefore, cannot be considered as inherently biodegradable under the strict terms and conditions of the OECD Guidelines. A COD value of 1.28 mg O2/mg was obtajned for the test material. TOC analysis of test item was not possible due to the test material adsorbing to the sewage sludge.
Conclusion
The substance is not inherently biodegradable.
Reference
All percentages of biodegradation values have been corrected for blank values.
Day | % biodegradation | |
Test item | Aniline | |
1 | 0 | 0 |
2 | 0 | 0 |
3 | 0 | 0 |
4 | 0 | 0 |
5 | 0 | 0 |
6 | 0 | 2 |
7 | 0 | 20 |
8 | 0 | 30 |
9 | 0 | 45 |
10 | 0 | 43 |
11 | 0 | 46 |
12 | 5 | 50 |
13 | 0 | 65 |
14 | 0 | 73 |
15 | 0 | 75 |
16 | 0 | 74 |
17 | 0 | 71 |
18 | 0 | 77 |
19 | 0 | 84 |
20 | 0 | 71 |
21 | 0 | 72 |
22 | 0 | 70 |
23 | 0 | 70 |
24 | 0 | 70 |
25 | 0 | 70 |
26 | 0 | 72 |
27 | 0 | 70 |
28 | 0 | 68 |
Description of key information
Neither readily nor inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
- Type of water:
- freshwater
Additional information
The substance is an azo dye, salified with lactate. Basic Yellow 094 is not expected to be ready biodegradable because of its chemical structure and the specific function. Commonly, dyes undergo a primary transformation, i.e. discolouration due to the interrupting the conjugation. Nevertheless, the degradation process involves more steps and takes more time.
There are no information about the biodegradability potential of Basic Yellow 094, thus available information on the structural analogue Similar Substance 01 have been taken into consideration. Similar Substance 01 is the acid form of Basic Yellow 094; the read across approach can be considered as appropriate and suitable to assess the property under investigation (details about the approach are reported into the IUCLID section 13).
The assessment of the inherently biodegradability potential of Similar substance 01 was investigated according to the OECD guideline 302C, Modified MITI (II) method. Test item attained negligable degradation, within 28 days, calculated from oxygen uptake (% of COD); therefore, it cannot be considered as inherently biodegradable under the strict terms and conditions of the OECD guidelines. A COD value of 1.28 mg O2/mg was obtajned for the test material. TOC analysis of test item was not possible as test material adsorbed to the sewage sludge.
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