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EC number: 236-291-8 | CAS number: 13282-70-7
- 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:
- 2015-02-05 to 2015-07-13
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- EC Method A.4; OECD Method 104
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- EC Method A.4; OECD Method 104
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Conclusions:
- The test substance was found to have a vapour pressure of 0.00076 Pa at 25°C.
- Executive summary:
A study was performed to determine the vapour pressure of the test substance. The study was designed in accordance with accepted principles in order to meet the requirements of REACH Regulation (EU) No 1907/2006 of the European Parliament and of the Council.
The method followed is amongst those described in Commission Regulation (EC) No. 440/2008 (Method A.4) and the OECD Guidelines for the Testing of Chemicals (Method 104).
The test substance was found to have a vapour pressure of 7.6 x 10-4 Pa at 25°C.
Reference
Calculations
Assuming no condensation, the vapour pressure is related to the observed mass difference by the relationship
Equation 1: Vapour pressure = (Δm * g) / A
When condensation occurs the mass difference can, by reduced momentum transfer, be decreased by up to a factor of two from that appropriate to equation 1. The vapour pressure can also be obtained from the kinetic theory relationship for effusion or complete condensation
Equation 2: Vapour pressure = (C / A) * sqrt (2πRT / M)
The efficiency of the condensation may be determined from the relative magnitudes of the measured mass difference and the condensation rate. For a degree of condensation, α, the measured condensation rate must be divided by this factor (α) to obtain the maximum condensation rate to be used in equation 2. Likewise, the experimental mass differences must be modified by a factor of 2/(2-α), which gives the appropriate factor of two enhancement in the vapour pressure calculation when the molecules do not bounce back.
By equating equations 1 and 2 at a given vapour pressure, it is possible to allow for the evaluation of α at each data point:
Equation 3: = [(2 - α) / 2α] * sqrt (2πRT / M) * (1 / g)
Rearranging equation 3 gives equation 4 from which α can be calculated directly
Equation 4: α = { [ (Δm * g) / A ] * sqrt (M / 2πRT) + 0.5 }-1
The effect of α on the two methods for estimating vapour pressure yields identical results. Confidence in this system is demonstrated by the observation that the values of α approach, but never exceed, unity (when α=1 there is 100% condensation).
The vapour pressure-temperature relationship is as follows:
Equation 5: Log10Vp = (Slope / T) + Intercept
Consequently, a plot of log10Vp versus 1/T(K) should be linear, and by interpolation the vapour pressure at 298.15K can be calculated.
Key results | Run 1 | Run 2 |
Correlation (r) | -0.9736 | -0.9784 |
Slope | -3996 | -3249 |
Intercept | 10.31 | 7.749 |
Vp (Pa) at 25°C | 8.0 x 10-4 | 7.1 x 10-4 |
The runs yielded a mean vapour pressure value at 25°C of 7.6 x 10-4 Pa.
Description of key information
The test substance was found to have a vapour pressure of 7.6 x 10-4 Pa at 25°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.001 Pa
- at the temperature of:
- 25 °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.