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Diss Factsheets
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EC number: 940-822-5 | CAS number: -
- 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
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Biodegradation in soil
Administrative data
- Endpoint:
- biodegradation in soil
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: Biodegradation in soil is examined. Sound study setup but no guideline followed and no half-life or % degradation determined.
Data source
Reference
- Reference Type:
- publication
- Title:
- Triglyceride degradation in soil
- Author:
- Hita, C. et al.
- Year:
- 1 996
- Bibliographic source:
- Org. Geochem 25(1-2): 19-28
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Test substance was added to 3 different soil types. Soils were incubated at 20°C for 8 weeks. CO2 evolution and formation of metabolites was monitored.
- GLP compliance:
- not specified
- Test type:
- laboratory
Test material
- Reference substance name:
- Glycerol tristearate
- EC Number:
- 209-097-6
- EC Name:
- Glycerol tristearate
- Cas Number:
- 555-43-1
- IUPAC Name:
- propane-1,2,3-triyl trioctadecanoate
- Test material form:
- not specified
Constituent 1
- Radiolabelling:
- no
Study design
- Oxygen conditions:
- aerobic
- Soil classification:
- not specified
Soil propertiesopen allclose all
- Soil no.:
- #1
- Soil type:
- other: Rendzina
- % Clay:
- 29
- % Org. C:
- 2.7
- pH:
- 8.1
- Soil no.:
- #2
- Soil type:
- Luvisol
- % Clay:
- 13.5
- % Org. C:
- 7
- pH:
- 4.1
- Soil no.:
- #3
- Soil type:
- other: Rendollic Eutrochrept
- % Clay:
- 25
- % Org. C:
- 2.2
- pH:
- 7.3
- Details on soil characteristics:
- Rendzina:
- 31% CaCO3
- CN ratio: 7.3
Glossic Luvisol:
- 7% CaCO3
- C/N ratio: 19
Rendollic eutrochrept:
- 4% CaCO3
- C/N ratio: 7.5
Duration of test (contact time)open allclose all
- Soil No.:
- #1
- Duration:
- 8 wk
- Soil No.:
- #2
- Duration:
- 8 wk
- Soil No.:
- #3
- Duration:
- 8 wk
Initial test substance concentrationopen allclose all
- Soil No.:
- #1
- Initial conc.:
- 2 000 mg/kg soil d.w.
- Based on:
- test mat.
- Soil No.:
- #2
- Initial conc.:
- 2 000 mg/kg soil d.w.
- Based on:
- test mat.
- Soil No.:
- #3
- Initial conc.:
- 2 000 mg/kg soil d.w.
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- test mat. analysis
Experimental conditionsopen allclose all
- Soil No.:
- #1
- Temp.:
- 20
- Soil No.:
- #2
- Temp.:
- 20
- Soil No.:
- #3
- Temp.:
- 20
- Details on experimental conditions:
- Three types of soils (rendzina, glossic luvisol and rendollic eutrochrept, see Table 1) were chosen from the Poitou-Charentes region, in the western part of France. Two of these soils (rendzina and glossic luvisol) have already been described by Mouqawi et al. (1981a) , the other soil is a brown calcareous one (rendollic eutrochrept). For each of these soils, the humiferous A horizon topsoil was sampled. The three soil samples were first sieved (<2 ram), adjusted to 2/3 of the water-holding capacity of each respective soil and then weighed into 750 cm 3 flasks in portions calculated to correspond to 100 g o.d. soil. The soils were subsequently supplemented with a pare triglyceride (tristearin) (Fluka Chemicals) at a concentration of 0.2% (wt/ wt). Controls and treatments were carried out similarly in triplicate, incubated for periods of 1 (samples C lw and TRI lw), 4 (samples C 4w and TRI 4w) and 8 weeks at 20°C. Throughout the chosen period the samples were aerated regularly in a closed system with moist, CO2-free air.
Results and discussion
- Evaporation of parent compound:
- not measured
- Volatile metabolites:
- no
- Residues:
- yes
Any other information on results incl. tables
The main result of the monoacid fraction analysis was the rapid formation of stearic acid in considerable amounts. This result showed that an intense hydrolysis reaction with specific lipases of tristearin had occurred after the soil supplementation. The investigation of ester fractions showed that new alkanoic acids (methyl stearate, ethyl stearate and propyl stearate), not determined in the controls, were generated in the supplemented soils.
After incubating for 4weeks, the authors observed a decrease in the amount of the components that were generated. It can be concluded that these did not accumulate and were gradually transformed in the biodegradation processes.
Results were similar in the three types of soils, showing more or less the general character of these mechanisms (independent in any case of soil pH and soil characteristics, even if the kinetics seem slightly different between acidic and neutral soils). The particular pathway shown here for the elimination of fatty wastes in the soil seems to be all the more important as it is known that fatty acids, mono/diglycerides and glycerol are removed more easily than triglycerides (Eigtved, 1992).
Applicant's summary and conclusion
- Executive summary:
The biodegradation of tristearin in soil was examined by adding the test substance to 3 different soil types. The soils were incubated at 20°C for 8 weeks. CO2 evolution and formation of metabolites were monitored.
The test showed a rapid formation of stearic acid and stearic esters in considerable amounts, demonstrating the primary degradation of the test substance under the conditions of the test. After 4 weeks of incubation, these components decreased again. It can therefore be concluded that the primary metabolites do not accumulate, but were further transformed in the biodegradation process.
Ultimate biodegradation as demonstrated by the formation of CO2 was found to be more dependent on te soil type when compared to primary degradation. A detailed study of the soil organic matter is necessary in order to understand the observed differences.
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Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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