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EC number: 211-687-3 | CAS number: 686-31-7
- 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
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Detailed report, by using the ASTM E1782-03 method
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- other: ASTM E1782-03, DSC (differential scanning calorimetry)
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.008 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.019 Pa
- Conclusions:
- The vapour pressure of the substance is determined to be close to 0.019Pa at 25°C .
With DSC method, the impurities more volatile than the substance are evaporated, and thus, will not affect the vapour pressure determination. - Executive summary:
A detailed study report on the measurement of vapour pressures according to ASTM E-1782 -03 is available. The relationship between vapour pressure and temperature was established with the Clausius-Clapeyron equation.
With this method, the volatile impurities do not have an effect on the vapour pressure determination
The vapour pressure of the substance is determined to be close to 1.9 10-4mbars, or 0.019Pa, at 25°C .
Reference
The experimental data obtained, with about 4 mg used in the SS test cell with a pierced lid, are listed below.
Measured Temperature °C |
Pressure mbars |
Pressure-corrected temperature °C |
106.18 |
4 |
101.62 |
109.97 |
7 |
107.13 |
Starting of decomposition observed, with endotherm |
10 |
Starting of decomposition observed, with endotherm |
The Clausius-Clapeyron equation resulting is:
y = 14456x + 33.053 (correlation coefficient R2= 1)
Extrapolated data – with high uncertainty- at 20°C and 25°C are :
-Pressure vapour at 20°C is determined to 8.1 10 -5mbars ;
-Pressure vapour at 25°C is determined to 1.9 10 -4mbars.
Description of key information
The vapour pressure of tert-amyl peroxy-2-ethylhexanoate is determined to be 0.019 Pa at 25°C, determinded by DSC (in order to limit the effect of volatile impurities on the vapour pressure determination)
Key value for chemical safety assessment
- Vapour pressure:
- 0.019 Pa
- at the temperature of:
- 25 °C
Additional information
Well detailed studies are available.
The vapour pressure was firstly determined with static method. The vapour pressure was determined to be 10.5hPa at 25°C, but the presence of a volatile impurity (tert-amyl hydroperoxide, vapour pressure of 43.2hPa) may have affected the vapour pressure determination (small amounts of volatile impurities may increase the vapour pressure by several orders of magnitude).
The DSC method was then used, and the vapour pressure was determined to be 0.019 Pa (more representative of the substance as impurities more volatile than the substance are evaporated).
In both methods, the relationship between vapour pressure and temperature was fitted with the Clausius-Clapeyron equation.
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