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EC number: 276-696-7 | CAS number: 72490-01-8
- 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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Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 07 Oct 1997 to 02 Dec 1997
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point)
- Version / remarks:
- Jul 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- Dec 1992
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
- Version / remarks:
- Aug 1996
- GLP compliance:
- yes
- Type of method:
- method according to Siwoloboff
- Key result
- Atm. press.:
- 0.065 Pa
- Decomposition:
- yes
- Decomp. temp.:
- 248 °C
- Remarks on result:
- not determinable
- Remarks:
- due to thermal decomposition before the boiling point is reached.
- Conclusions:
- Due to the thermal decomposition of the test substance it was not possible to determine the boiling point under normal pressure. Thermal decomposition in air starts at 248 °C before boiling point is reached.
- Executive summary:
The boiling temperature of the test substance was assessed in accordance with OECD TG 103, EC Method A.2 and EPA OPPTS Guideline 830.7220 and in compliance with GLP. The test substance started to decompose at 248 °C, before the boiling point is reached. The boiling point at reduced pressure based on the study on vapour pressure curve is 100.4 °C at 65 mPa.
Reference
RESULTS
The following investigations of the boiling behaviour of the test substance were carried out.
- The first investigation, using a heating rate of 20.0 °C / minute and starting at 100.0 °C. A boiling point of 300.4 °C was determined. After the determination the colour of the sample was noted to have changed from colourless to light yellow.
- The second investigation, which started at 250.0 °C, used a heating rate of 10.0 °C / minute. A boiling point of 271.6 °C was determined. Again, after this determination a slight yellow discoloration was visible in the sample.
- For the third and fourth investigations a heating rate of 3.0 °C / minute was employed, starting from 220.0 °C. Boiling points of 264.2 °C and 261.6 °C were obtained: following both determinations yellow discoloration in the samples were visible.
- For the final investigation a heating rate of 0.9 °C / minute was employed, starting from 250 °C. This was discontinued at about 270 °C, without a boiling point having been detected. The colour of the sample had changed to yellow-brown.
- A second control determination of the boiling point of toluene was performed using the same conditions as before. A boiling point of 109.7 °C was determined. Using the measured atmospheric pressure, 98 - 22 kPa, the temperature correction factors given in the OECD TG 103, the Sidney-Young number-value-equation, and the boiling point of toluene at standard pressure, it was possible to calculate the corrected boiling point, 109.5 °C, of toluene at the measured atmospheric pressure. The average, experimentally determined boiling point of toluene, 109.8 °C, agreed well with this calculated, corrected value. Although boiling points of the test substance had been determined, the difference between the values obtained and the observed discoloration indicated that thermal decomposition could also be occurring.
In order to interpret the observations made, additional investigations were performed under GLP, using DSC, by the testing facility. Under nitrogen, using a heating rate of 10.0 °C / minute, decomposition was determined to start at a temperature of about 277 °C. In the temperature range between the melting point and the onset of decomposition there was no endothermic deviation from the base line, which would have indicated that boiling was starting to occur. In air, also using a heating rate 10.0 °C / minute, decomposition was determined to start at a temperature of about 248 °C, with peak maximum occurring at about 317 °C. Again, in the temperature range between the melting point and the onset of decomposition there was no endothermic deviation from the base line.
The DSC results indicated that the test substance started to decompose in air at about 248 °C and before the boiling point could be reached. Therefore, the most likely explanation for the generation of the gas bubbles, which triggered automatically a response in the boiling point apparatus, is decomposition with an associated evolution of gas, rather than the actual occurrence of boiling.
Results from a Vapour Pressure Study
This study was performed under GLP, in accordance with the EEC method A.4 and the OECD TG 104. At a reduced pressure of 65 mPa the test substance would boil at 100.4 °C.
Description of key information
The test substance started to decompose thermally at about 248 °C, prior to reaching the boiling. At a reduced pressure of 65 mPa the test substance would boil at 100.4 °C, OECD TG 103, Das 1997.
Key value for chemical safety assessment
- Temperature of decomposition (state purity):
- 248 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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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