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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 soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in soil
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Well documented publication, suitable test system used, though non-guideline non-GPL study acceptable for assessment.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Fate of the test substance in soil. Measurement of mineralisation. Use of 14C-labeled test substance.
- GLP compliance:
- not specified
- Test type:
- laboratory
- Radiolabelling:
- yes
- Oxygen conditions:
- aerobic
- Soil classification:
- USDA (US Department of Agriculture)
- Year:
- 1 979
- Soil no.:
- #1
- Soil type:
- sandy loam
- % Clay:
- ca. 10
- % Silt:
- ca. 18
- % Sand:
- ca. 72
- % Org. C:
- 2.4
- pH:
- 7.7
- CEC:
- 9.7 meq/100 g soil d.w.
- Details on soil characteristics:
- SOIL COLLECTION AND STORAGE
- Geographic location: non-cultivated plot in Midland, Michigan
- Pesticide use history at the collection site: none
- Sampling depth (cm): 15 cm
- Soil preparation (e.g., 2 mm sieved; air dried etc.): 2 mm sieved
- Storage: at 4°C with a field moisture of 9% w/w - Soil No.:
- #1
- Duration:
- >= 8 - <= 15 d
- Soil No.:
- #1
- Initial conc.:
- 1.4 mg/kg soil d.w.
- Based on:
- test mat.
- Soil No.:
- #1
- Initial conc.:
- 201 mg/kg soil d.w.
- Based on:
- test mat.
- Soil No.:
- #1
- Initial conc.:
- 2 000 mg/kg soil d.w.
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- radiochem. meas.
- Soil No.:
- #1
- Temp.:
- 25°C
- Humidity:
- no data
- Microbial biomass:
- 6.6E06 bacteria/g d.w.
- Details on experimental conditions:
- 1. PRELIMINARY EXPERIMENTS:
2. EXPERIMENTAL DESIGN
- Soil condition: fresh
- Soil (g/replicate): 20 (d.w.)
- Control conditions, if used (present differences from other treatments, i.e., sterile/non-sterile, experimental conditions): sterilised soil (autoclaved (60 min, 121 °C, 15 psi on three consecutive days)
- Test apparatus (Type/material/volume): batch microcosm experiments performed in 100-mL glass serum bottles sealed with Teflon-faced butyl rubber septa and aluminum crimp seals
- Details of traps for CO2 and organic volatile, if any: Two traps were connected containing 10 mL 1 N NaOH.
- If no traps were used, is the system closed/open: closed
Test material application
- Volume of test solution used/treatment: 20 mL deionised water
- Application method (e.g. applied on surface, homogeneous mixing etc.): mixed (shaken (100 rpm) )
Experimental conditions (in addition to defined fields)
- Moisture maintenance method: cosed system
- Continuous darkness: Yes
3. OXYGEN CONDITIONS (delete elements as appropriate)
- Methods used to create the an/aerobic conditions: headspace purged with oxygen gas (>= 99.5% v/v)
4. SAMPLING DETAILS
- Sampling intervals: not specified
- Sampling method for soil samples:
- Method of collection of CO2 and volatile organic compounds: CO2 was collected after acidification of the microcosms (pH <=2, 85% H3PO4) and purging with nitrogen gas. Collection of CO2 in traps. - Soil No.:
- #1
- % Degr.:
- 100
- Parameter:
- test mat. analysis
- Remarks:
- (initial TEA conc.: 1.4 mg/kg dw)
- Sampling time:
- 2 d
- Soil No.:
- #1
- % Degr.:
- 100
- Parameter:
- test mat. analysis
- Remarks:
- (initial TEA conc.: 201 mg/kg dw)
- Sampling time:
- 7 d
- Soil No.:
- #1
- DT50:
- >= 0.5 - <= 1.8 d
- Type:
- (pseudo-)first order (= half-life)
- Remarks on result:
- other: Degradation half-life depends on the concentration of the test substance. Mineralization half-lifes: >= 1.4 - <= 5.4 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: 46% to 56%
STERILE TREATMENTS (if used)
- Transformation of the parent compound: no - Conclusions:
- TEA is rapidly biodegraded and mineralized in soil.
Reference
TEA primary biodegradation and mineralisation
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) |
||
1.4 |
1.38 |
0.5 |
0.406 |
1.7 |
55±3 |
201 |
0.607 |
1.1 |
0.498 |
1.4 |
56±1 |
2000 |
0.380 |
1.8 |
0.129 |
5.4 |
46±17 |
Description of key information
Triethanolamine is rapidly biodegraded and mineralized in soil under semi-realistic conditions.
Key value for chemical safety assessment
Additional information
For the purpose of this registration data on the biodegradation in soil is 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.
As key study regarding the biodegradation of the amine part in soil performed by West et al. (1996) is identified. Depending on the initial test substance concentration under semi-realistic conditions with soil microcosms using natural sandy loam soil a maximum biodegradation half-life of 1.8 days and a maximum mineralization half-life of 5.4 days were determined.
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