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EC number: 211-681-0 | CAS number: 685-63-2
- 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
Additional physico-chemical information
Administrative data
- Endpoint:
- other: decomposition
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Reference
- Endpoint:
- auto-ignition temperature (gases)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- The determination of autoignition temperature at 6 bar have been performed.
- GLP compliance:
- not specified
- Key result
- Remarks on result:
- other: No autoignition tempererature have been measured at 6 bar up to 500°C
- Conclusions:
- The autoignition temperature of the test substance is higher than 500°C at 6 bar.
- Executive summary:
The autoignition of the test substance was performed according to a method which meets generally accepted scientific principles and was well documented.
The test substance was put into a heated flask (100°C), then the temperature of the flask is increased. Pressure and temperature of the flask were measured. A sudden increase of these two parameters is the criterion for autoignition of the test substance.
The autoignition temperature of the test substance is higher than 500°C at 6 bar.
The criterion for autoignition was sudden temperature and pressure increase.
During the screening test up to 500°C a sudden decomposition was not observed. At temperatures of more than 450°C a moderate pressure decrease was found. Maybe, this is caused by a slow decomposition or cracking reaction.
Additionnal test were performed at a maximum temperature of 500°C, no autoignition reaction was observed. So the autoignition at 6 bar is above 500°C.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- In order to determine the explosion behaviour of the test item without any oxidizer (like oxygen and air), the following test were performed:
- determination of the limiting pressure for decomposition in gasesous phase at 50°C
- determination of explosion parameters in gaseous phase at 50°C
Test material
- Reference substance name:
- 1,1,2,3,4,4-hexafluorobuta-1,3-diene
- EC Number:
- 211-681-0
- EC Name:
- 1,1,2,3,4,4-hexafluorobuta-1,3-diene
- Cas Number:
- 685-63-2
- Molecular formula:
- C4F6
- IUPAC Name:
- hexafluorobuta-1,3-diene
- Test material form:
- gas
1
Results and discussion
- Results:
- The limiting pressure at 50°C is 1.8 bar. The calculated limited pressure at 22°C is 2 bar.
The explosion pressure and maximum pressure are respectively: 32.65 bar, 104.9 bar/s at 50°C and 48.68 bar, 196.1 bar/s at 60°C.
At 70 bar, the maximum temperature of liquid was 118°C. The liquid phase did not decompose.
At 250 bar, the maximum temperature of liquid is higher than 1 000°C. The complete mass of the test item decomposed.
Any other information on results incl. tables
Results for limiting pressure for decomposition (pl):
The test was carried out with an ignition energy of 60 - 80 Ws. The criterion for a dangerous decomposition reaction was a pressure rise after ignition of more than 20%.
The limiting pressure (pl) at which at 50°C no run-away decomposition reaction in gaseous phase occurs is 1.8 bar (abs). At this initial pressure 2 check tests were carried out. The limiting decomposition pressure corresponds to an equilibrium temperature of 22°C have been calculated. The value obtained in: 2 bar (abs)
Results of explosion parameters in gaseous phase:
The explosion pressure and the maximum pressure rise were measured in each 3 ignition trials at 3.0 bars and 4.5 bar. The 3 tests at 4.5 bar had to carry out at a temperature of 60°C.
The ignition energy was 75 - 95 Ws.
Test | Temperature (°C) | Initial pressure (bar) | Explosion pressure (bar) | maximum pressure rise (bar/s) |
1 | 50 | 2.98 | 31.93 | 64.5 |
2 | 50 | 3.00 | 32.65 | 104.9 |
3 | 50 | 3.00 | 31.80 | 53.8 |
4 | 60 | 4.46 | 48.68 | 196.1 |
5 | 60 | 4.49 | 49.32 | 127.2 |
6 | 60 | 4.52 | 48.74 | 100.4 |
For safety aspects the worst case results (bold numbers) should be used to design explosion protectop, devices.
Results for explosion parameters with 20 vol% of additional liquid phase
3 tests were carried out in a heated autoclave at 50°C. The ignition energy was 75 - 80Ws. The measured equilibrium pressure was 4.8 bar (abs).
At 70 and 250 bar, the pressure increased moderate during the first two seconds. Then it accelerated strongly. In case of 70 bar, the maximum temperature of liquid phase was 118°C and then decreased. The liquid phase did not decompose.
At 250 bar, the temperature increased rapidly and the two thermocouples (used to determine the temperature inside the test vessel) were destroyed. At this time, the pressure and temperature inside the vessel were in an supercritical state and the complete mass of the test item decomposed. A fast decomposition reaction of liquid phase at lower temperature, similar to an explosive, was not observed.
Applicant's summary and conclusion
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