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EC number: 401-280-0 | CAS number: 91273-04-0 CM 23-376; REOMET 30
- 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
Hydrolysis
Administrative data
Link to relevant study record(s)
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- June 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Remarks:
- For this study no standard guideline is available but study was performed according to GLP.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The decomposition of the test item in water or in mixtures of organic solvents and water is very fast and therefore its hydrolysis parameters cannot be determined according to OECD Guideline TG111 (“Hydrolysis as a Function of pH”). Therefore, this study was subdivided into two parts:
- Investigations on the test item and hydrolysis products by LC/MS with an aqueous/organic mobile phase.
- NMR investigations on the test item in an organic solvent and in mixtures of this organic solvent and water. - GLP compliance:
- yes (incl. QA statement)
- Radiolabelling:
- no
- Analytical monitoring:
- yes
- Positive controls:
- no
- Negative controls:
- no
- Preliminary study:
- The purpose of this study was to show that the test item hydrolyses in water very quickly. Therefore, two different sets of experiments have been performed:
Investigations by LC/MS
Investigations by 1H-NMR - Transformation products:
- yes
- No.:
- #1
- No.:
- #2
- No.:
- #3
- Key result
- Remarks on result:
- not determinable because of methodological limitations
- Details on results:
- Investigations by LC/MS:
Introduction of the test item in organic solvent into a HPLC-MS system leads to only one sharp peak in the chromatogram, which is identical to the reference solution of the degradation product bis(2-ethylhexyl)amine. This proves that the test item hydrolyses almost instantly, when it comes into contact with the aqueous eluent of the HPLC.
Investigations by 1H-NMR:
Solutions of the test item in pure acetonitrile and in mixtures of acetonitrile and water at different ratios and after different times have been analyzed by 1H-NMR. The experiments prove that hydrolysis of the test item, even with small amounts of water, is very fast. A stable equilibrium is formed within one hour. The degradation products are clearly identified.
In nature, where the test item would come into contact with a billion-fold excess of water, immediate hydrolysis will occur - Conclusions:
- The substance EC 401-280-0 hydrolyses in contact with water almost immediately. The identified hydrolyses products are formaldehyde, bis(2-ethylhexylamine) and 1H-1,2,4-triazole.
Reference
Description of key information
The substance EC 401-280-0 hydrolyses in contact with water almost immediately. The identified hydrolyses products are formaldehyde, bis(2-ethylhexylamine) and 1H-1,2,4-triazole.
Hydrolysis of formaldehyde and
bis(2-ethylhexyl)amine is not expected due to their chemical structure.
The hydrolysis half-life of 1H-1,2,4-triazole is > 30days.
Key value for chemical safety assessment
Additional information
Parent substance EC 401 -280 -0
The results of the Hydrolysis study (Ciba, 2009) show that the test item hydrolyses rapidly in water. The identified degradation products are bis(2-ethylhexyl)amine, 1H-1,2,4-triazole and formaldehyde. The study includes two sets of experiments:
1st experiment: Investigation by LC/MS showed one sharp peak which is identical with a degradation product of the test item. This proves that the test item hydrolyses almost instantly, when it comes into contact with the aqueous eluent of the HPLC.
2nd experiment: Investigation by H-NMR showed that solutions of the test item are stable in pure acetonitrile for at least 20 h. Immediately after addition of D2O degradation products of the test item occured. The experiments prove that hydrolysis of test item, even with small amounts of water, is very fast.
hydrolysis products:
bis(2 -ethyhexyl)amine
The structure of the substance does not contain any functional groups sensitive to hydrolysis
Formaldehyde
Hydrolysis is not expected
1H-1,2,4 -triazole
Data with 1,2,4-triazole show that hydrolysis half-life was not observed during 30 days, therefore the half-life is > 30days.
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