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EC number: 279-506-0 | CAS number: 80584-92-5
- 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 and sediment: simulation tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: sediment simulation testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Non-GLP non-guideline study, well documented, suitable test system, acceptable for assessment.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Fate of 14C-labeled test substance in an artificial water-sediment system (biodegradation study in river-microcosms)
- GLP compliance:
- not specified
- Radiolabelling:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water / sediment
- Details on source and properties of surface water:
- - Details on collection (e.g. location, sampling depth, contamination history, procedure): Water and sediment samples were collected from two sites
1) Tittabawassee river near Midland, Michigan, USA (date: 16 June 1992)
2) Chippewa River near Mount Pleasant, Michigan, USA (28 June 1992).
- Procedure: Water samples were collected in sterile amber glass bottles from the upper 1 to 5 cm of the water column near the center of each river.
- Storage conditions: transported on ice to laboratory; stored at 4 °C
- Water filtered: no
- pH at time of collection: 7.7 / 7.7
- Total organic carbon: 8.1 / 8.7
- Total inorganic carbon: 48.7 / 46.6
- Biomass (Bacteria/mL): 6.4E03 / 3.3E03 - Details on source and properties of sediment:
- - Details on collection (e.g. location, sampling depth, contamination history, procedure): Water and sediment samples were collected from two sites
1) Tittabawassee river near Midland, Michigan, USA (date: 16 June 1992)
2) Chippewa River near Mount Pleasant, Michigan, USA (28 June 1992).
- Procedure: Sediment samples were collected in sterile jars from the upper 5 cm of strata immediately underlying the water collection sites.
- Storage conditions: transported on ice to laboratory; stored at 4 °C
- Textural classification (i.e. %sand/silt/clay): 1) 90% sand, 4% silt, 6% clay; 2) 96% sand, 0% silt, 4% clay
- pH: 8.1 / 7.8
- Organic carbon (%): 0.52 / 0.23
- CEC (meq/100 g): 6.1 / 6.3
- Biomass (bacteria/g d.w.): 2.5E07 / 5.9E06
- Sediment samples sieved: yes (2 mm) - Duration of test (contact time):
- > 7 - < 15 d
- Initial conc.:
- >= 100 - <= 489 µg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- radiochem. meas.
- Details on study design:
- TEST CONDITIONS
- Volume of test solution/treatment: 1) river water only: 50 mL; 2) sediment-amended river water: 50 mL river water, 10 g d.w. sediment
- Solubilising agent (type and concentration if used): no
- Test temperature: 25 °C
- pH adjusted: no
- Aeration of dilution water: no
- Continuous darkness: yes
- Other: shaken (100 rpm)
TEST SYSTEM
- Culturing apparatus: 100-mL glass serum bottle
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: headspace purged with oxygen gas (>= 99.5% v/v)
- Measuring equipment:
- Test performed in closed vessels due to significant volatility of test substance: bottles sealed with Teflon-faced butyl rubber septa and Al crimp seals
- Details of trap for CO2 and volatile organics if used: Two traps were connected containing 10 mL 1 N NaOH.
SAMPLING
- Sampling frequency: 1) Tittabawassee: primary biodegradation after 0, 1, 2 d; mineralisation after 0, 1, 7 d
2) Chippewa: primary biodegradation after 0, 1, 2, 3 d; mineralisation after 0, 1, 3, 15 d
- Sampling method: CO2 was collected after acidification of the microcosms (pH <=2, 85% H3PO4) and purging with nitrogen gas. Collection of CO2 in traps.
CONTROL AND BLANK SYSTEM
- Abiotic sterile control: yes (biologically inhibited control, 2 % w/w formaldehyde) - % Degr.:
- 100
- Parameter:
- test mat. analysis
- Sampling time:
- 2 d
- Remarks on result:
- other: initial TEA conc.: 100 µg/L; Tittabawassee, sediment-amended river water
- % Degr.:
- 100
- Parameter:
- test mat. analysis
- Sampling time:
- 3 d
- Remarks on result:
- other: initial TEA conc.: 100 µg/L; Chippewa, sediment-amended river water
- % Degr.:
- ca. 100
- Parameter:
- test mat. analysis
- Sampling time:
- 20 d
- Remarks on result:
- other: initial TEA conc.: 100 µg/L; Tittabawassee, river water only
- % Degr.:
- ca. 100
- Parameter:
- test mat. analysis
- Sampling time:
- 35 d
- Remarks on result:
- other: initial TEA conc.: 100 µg/L; Chippewa, river water only
- Compartment:
- other: water-sediment
- DT50:
- 0.2 - 0.6 d
- Type:
- (pseudo-)first order (= half-life)
- Temp.:
- 25 °C
- Remarks on result:
- other: Sediment-amended river water; values depending on test concentration and source of sediment and water. First-order half life for mineralization: 1.0 - 7.2 days
- Compartment:
- water
- DT50:
- 0.8 - 1.7 d
- Type:
- (pseudo-)first order (= half-life)
- Temp.:
- 25 °C
- Remarks on result:
- other: River water only; values depending on test concentration and source of water. First-order half life for mineralization: 1.2 - 1.9 days
- Transformation products:
- not specified
- Details on transformation products:
- - Formation and decline of each transformation product during test: Degradation products were sporadically detected, but remained below quantification limits. Complete removal coincided with complete removal of TEA
- Evaporation of parent compound:
- no
- Volatile metabolites:
- not specified
- Residues:
- not specified
- Details on results:
- TEST CONDITIONS
- Aerobicity (or anaerobicity), moisture, temperature and other experimental conditions maintained throughout the study: Yes
- Anomalies or problems encountered (if yes): no
MINERALISATION
- % of applied radioactivity present as CO2 at end of study: River water only: 58% to 64%; Sediment-amended river water: 49% to 63%
STERILE TREATMENTS (if used)
- Transformation of the parent compound: no - Validity criteria fulfilled:
- yes
- Conclusions:
- TEA is rapidly biodegraded and mineralized within a sediment-water test system.
Reference
Matrix |
Initial TEA conc. (µg/L) |
Biodegradation |
Mineralisation |
%Theroretical CO2 yield (mean±SD, n = 2) |
||
Rate constant (/d) |
Half-life (d) |
Rate constant (/d) |
Half-life (d) |
|||
River water |
||||||
Chippewa |
100 |
0.402 |
1.7 |
not measured |
not measured |
not measured |
Tittabawassee |
100 |
0.685 |
1.0 |
0.359 |
1.9 |
64±2 |
489 |
0.841 |
0.8 |
0.558 |
1.2 |
58±3 |
|
Sediment-amended river water |
||||||
Chippewa |
100 |
2.40 |
0.3 |
0.724 |
1.0 |
52±7 |
489 |
1.07 |
0.6 |
0.563 |
1.2 |
63±1 |
|
Tittabawassee |
100 |
3.25 |
0.2 |
0.385 |
1.8 |
49±3 |
489 |
1.63 |
0.4 |
0.096 |
7.2 |
58±1 |
Recovery of TEA in biologically inhibited controls:
water-sediment: 92-100%
river: 100-126%
Incorporation of sediment into the test matrix did not result in increased abiotic losses of the test material.
Description of key information
Triethanolamine is rapidly biodegraded and mineralized within a sediment-water test system.
Key value for chemical safety assessment
Additional information
For the purpose of this registration data on the biodegradation in water and sediment: simulation tests are not required. The present compound consists of a triazine part and an amine part. Under environmental conditions it is present in its dissociated form. Data for the present endpoint are only available for the amine part CAS 102 -71 -6.
A key study regarding biodegradation of the amine part in a sediment-water microcosm test performed by West et al. (1996) is identified. In a sediment-water microcosm-study with natural sediment and water samples a maximum biodegradation half-life of 0.6 days and a maximum mineralization half-life of 7.2 days was found, depending on the initial concentration of the test substance and the origin of the test water and sediment.
In a river-water microcosm-study with natural river water samples a maximum biodegradation half-life of 1.7 days and a maximum mineralization half-life of 1.9 days was found, depending on the initial concentration of the test substance and the origin of the test water and sediment.
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