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EC number: 205-755-1 | CAS number: 150-25-4
- 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: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 03 January 2018 - 15 February 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Version / remarks:
- 17 July 1992
- Deviations:
- no
- GLP compliance:
- yes
- Specific details on test material used for the study:
- Solubility in water: 167.13 g/L (20°C)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: 'Waterschap Aa en Maas', 's-Hertogenbosch, The Netherlands,
- Pretreatment: The freshly obtained sludge was coarsely sieved (1 mm) washed with mineral medium and kept under continuous aeration until further treatment.
- Concentration of suspended solids: 3.0 g/L - Duration of test (contact time):
- 28 d
- Initial conc.:
- 48 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST ITEM PREPARATION
Since the test item was easily soluble in water, the test media were prepared using a stock solution of 1 g/L in mineral medium. A weighed amount of 251.64 mg of test item was dissolved in mineral medium and made up to 250 mL. After stirring for 19 minutes, the final stock solution was clear and colourless. Aliquots of 17 mL of the stock solution were added to test item bottles A and B, and a 12 mL aliquot was added to the toxicity control. The test solutions were continuously stirred during the test, to ensure optimal contact between the test item and the test organisms.
TEST CONDITIONS
- Composition of medium: according to OECD guideline 301
- Test temperature: 22 - 24°C.
- pH: between 7.8 on day 0 and ranging from 7.5-8.7 on day 28, in all test bottles.
- pH adjusted: no
- Suspended solids concentration: 9 mg/L
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: 500 mL brown colored glass bottles, fill volume: 360 or 244 mL (depending on headspace-to-volume ratio)
- Number of culture flasks/concentration: 2 bottles for the test item and the inoculum blank, 1 bottle for the procedure control and the toxicity control
- Measuring equipment: the respirometer used was a Lovibond BD600-GLP manometric respirometry system, equipped with an inductive stirring system.
- Details of trap for CO2 and volatile organics if used: two pellets of sodium hydroxide were placed in rubber gaskets and used as CO2 absorbent
SAMPLING
- Sampling frequency: on day 0, 4, 7, 11, 14, 18, 21, 25, 28
- Sampling method: recording of measurements in air pressure decrease by respirometer heads which automatically converts data into oxygen consumption (mg O2/L).
- Other: pH was measured at day 0 and day 28, temperature was measured continuously
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes, containing inoculum only
- Abiotic sterile control: no
- Toxicity control: yes, containing inoculum, test item and reference item
- Other: procedure control, containing inoculum and reference item
STATISTICAL METHODS: no statistical analysis was performed - Reference substance:
- acetic acid, sodium salt
- Remarks:
- Purity: 99.5%; ThOD: 0.78 mg O2/mg
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 94
- Sampling time:
- 28 d
- Remarks on result:
- other: for duplicate bottles tested
- Details on results:
- - The ThOD of the test item was calculated to be 1.67 mg O2/mg.
- The relative biodegradation values calculated from the measurements performed during the test period revealed 94% for both bottle A and B (based on ThOD). Furthermore, biodegradation of Bicine of at least 60% was reached within a 10-day window.
- In the toxicity control, more than 25% biodegradation occurred within 14 days (92%, based on ThOD). Therefore, the test item was assumed not to inhibit microbial activity.
- The test conditions (temperature and pH) were within the presciribed limits during the exposure period. - Validity criteria fulfilled:
- yes
- Remarks:
- see 'overall remarks'
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Under the conditions of the Manometric Respirometry Test, performed according to OECD 301F and GLP principles, the substance was determined to be readily biodegradable (94%).
Reference
Table 1 O2 Consumption and Percentage Biodegradation of the Test Item (Bottle A)
Day |
Oxygen consumption (mg O2/L) |
BOD |
Biodegradation*) (%) |
||
Blank (mean) |
Bottle A |
||||
0 |
2 |
1 |
0 |
0 |
|
4 |
8 |
8 |
0 |
0 |
|
7 |
11 |
15 |
5 |
6 |
|
11 |
14 |
64 |
51 |
64 |
|
14 |
14 |
75 |
62 |
77 |
|
18 |
15 |
83 |
69 |
86 |
|
21 |
16 |
87 |
72 |
90 |
|
25 |
16 |
90 |
75 |
94 |
|
28 |
16 |
90#) |
75 |
94 |
|
*): Calculated as the ratio between BOD and ThOD of test item added: 79.4 mg O2/L. #): Value was >90 and was outside the programmed measurement range. |
|
Table 2 O2 Consumption and Percentage Biodegradation of the Test Item (Bottle B)
Day |
Oxygen consumption (mg O2/L) |
BOD |
Biodegradation*) (%) |
||
Blank (mean) |
Bottle B |
||||
0 |
2 |
1 |
0 |
0 |
|
4 |
8 |
10 |
2 |
3 |
|
7 |
11 |
16 |
6 |
7 |
|
11 |
14 |
61 |
48 |
60 |
|
14 |
14 |
70 |
57 |
71 |
|
18 |
15 |
81 |
67 |
84 |
|
21 |
16 |
87 |
72 |
90 |
|
25 |
16 |
90#) |
75 |
94 |
|
28 |
16 |
90#) |
75 |
94 |
|
*): Calculated as the ratio between BOD and ThOD of test item added: 79.4 mg O2/L. #): Value was >90 and was outside the programmed measurement range. |
|
Description of key information
Under the conditions of the Headspace Test, performed according to OECD 310 and GLP principles, the test item biodegraded for 64% but did not fulfill the 10-day window criterion. Therefore, the substance was determined to be not readily biodegradable. However, under the conditions of the Manometric Respirometry Test, performed according to OECD 301F and GLP principles, the substance was determined to be readily biodegradable (94%). The latter test overrules the first one according to OECD test guideline 310, and therefore the test substance is considered to be readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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