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EC number: 205-451-9 | CAS number: 141-05-9
- 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
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 22 March 2004 to 27 July 2004
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Cross-reference
- Reason / purpose for cross-reference:
- reference to other study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 004
- Report date:
- 2004
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- Diethyl maleate
- EC Number:
- 205-451-9
- EC Name:
- Diethyl maleate
- Cas Number:
- 141-05-9
- Molecular formula:
- C8H12O4
- IUPAC Name:
- diethyl (Z)-but-2-enedioate
- Details on test material:
- - Name of test material (as cited in study report): DIETHYLMALEINATE
- Physical state: Colourless liquid.
- Batch No.: ETLM 201.
- Expiration date of the lot/batch: 30 June 2005.
- Stability under test conditions: Stability in aqueous solution: stable
- Storage condition of test material: Room temperature, in the dark, may be used under light.
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Activated sludge was collected from a sewage treatment works A-2500 Baden, which waste-water catchment is predominantly domestic. On arrival in the laboratory, the sample was aerated by means of a filtered compressed air before being used for the study.
The suspended solids concentration was determined by filtering a 5 mL sample through a pre-dried and pre-weighed glass filter (Whatman GF/C). The filter with solids were dried at 105 °C and re-weighed and the sludge solids determined by difference.
The inoculum was not acclimatised or adapted to "DIETHYLMALEINATE" before exposure to the test substance in this study. The concentration of the final suspended solids of the sludge in all vessels was nominally 20 mg/L. - Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 27 mg/L
- Based on:
- test mat.
- Initial conc.:
- 15 mg/L
- Based on:
- other: Carbon
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium: mineral medium as described in the guideline.
- Additional substrate: none.
- Solubilising agent (type and concentration if used): none.
- Test temperature: 22.1 +- 0.4 °C.
- pH: determined, for details see aditional background material: Key. Weiss Fuchs 2004. Carbon Dioxide Evolution Test for Ready Biodegradability Tables and figures.pdf
- pH adjusted: no
- Suspended solids concentration: 20 mg/L.
- Continuous darkness: yes.
TEST SYSTEM
- Culturing apparatus: 5 L flasks.
- Number of culture flasks/concentration: 2 negative control flasks, 2 test substance flasks, 1 positive control flask, 1 toxicity control flask.
- Method used to create aerobic conditions: Apparatus for carbon dioxide scrubbing and a mixture of CO2-free oxygen and CO2-free nitrogen, from gas cylinders, in the correct proportions (20 % O2: 80 % N2) were used.
- Test performed in closed vessels.
SAMPLING
- Sampling frequency: The CO2 evolution was determined on Days 1, 2, 4, 6, 8, 10, 15, 20, 25 and 28/29.
Day 0 was the day of the addition of the test substance to the medium.
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
- Abiotic sterile control: no
- Toxicity control: yes, containing test substance and positive reference substance.
- Other: Positive reference substance.
STATISTICAL METHODS: no.
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
- Preliminary study:
- None.
- Test performance:
- No unusual observations were made.
% Degradationopen allclose all
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 60.1
- Sampling time:
- 8 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 96.7
- Sampling time:
- 28 d
- Details on results:
- In this Carbon Dioxide Evolution Test the biodegradation of "DIETHYLMALEINATE" was 93.7 % and 99.6 % with a mean of 96.7 % after 28 days. The "10-d window" as defined by the guidelines started on approx. Day 3. 60 % degradation was exceeded on approximately Day 8.
For more details please see aditional background material: Key. Weiss Fuchs 2004. Carbon Dioxide Evolution Test for Ready Biodegradability Tables and figures.pdf.
BOD5 / COD results
- Results with reference substance:
- Positive control: 73.7% biodegradation after 10 days. The plateau of biodegradation was reached on about Day 10 and the degradation of the positive control substance sodium benzoate reached the pass level of 60 % on Day 6. The test is considered to be valid.
Toxicity control: 80.8 % biodegradation after 28 days. Degradation in the toxicity control, which contained sodium benzoate and the test substance, was not indicative of an inhibition of the microbial activity by the test substance.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The ready biodegradability of "DIETHYLMALEINATE" was determined by the measurement of carbon dioxide evolution at frequent intervals over a 28 d period. The method used was that described in Part C.4-C of the EC Commission Directive 92/69/EEC and in the OECD Guideline 301B.
Results:
The reference substance sodium benzoate was degraded by 73.7 % within 10 days.
Degradation in the toxicity control, which contained sodium benzoate and the test substance, was not indicative of an inhibition of the microbial activity by the test substance.
The test substance "DIETHYLMALEINATE" was degraded by 96.7 % after 28 days of incubation. The "10-d window" as defined by the Guideline started at approx. Day 3. 60 % degradation was exceeded already at Day 8.
Classification
According to the Guidelines a substance giving a result greater than 60 % degradation in a 10 day window within 28 days is regarded as "readily biodegradable".
According to the results of this study, "DIETHYLMALEINATE" can therefore be classified as readily biodegradable. - Executive summary:
The ready biodegradability of "DIETHYLMALEINATE" was determined by the measurement of carbon dioxide evolution at frequent intervals over a 28 d period. The method used was that described in Part C.4-C of the EC Commission Directive 92/69/EEC and in the OECD Guideline 301B.
Results:
The reference substance sodium benzoate was degraded by 73.7 % within 10 days.
Degradation in the toxicity control, which contained sodium benzoate and the test substance, was not indicative of an inhibition of the microbial activity by the test substance.
The test substance "DIETHYLMALEINATE" was degraded by 96.7 % after 28 days of incubation. The "10-d window" as defined by the Guideline started at approx. Day 3. 60 % degradation was exceeded already at Day 8.
Classification
According to the Guidelines a substance giving a result greater than 60 % degradation in a 10 day window within 28 days is regarded as "readily biodegradable".
According to the results of this study, "DIETHYLMALEINATE" can therefore be classified as readily biodegradable.
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