Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 919-697-6 | CAS number: -
- 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:
- 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- not specified
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Temp.:
- 25 °C
- Vapour pressure:
- 1.6 other: mPa
- Conclusions:
- The vapour pressure of the substance was determined as 1.6 mPa (0.000016 mbar = hPa) at 25 °C
- Executive summary:
The vapour pressure of the substance was determined using the Knudsen effusion method (mass-loss technique), according to OECD guideline 104 and EU method A.4.
The quality of the apparatus was previously verified with the measurement of well known reference compounds.
Experiments were performed at temperatures between 25 °C and 49 °C. The results did not allow the establishment of an acceptable relation between the vapour pressure of the compound and temperature, due to the fact that the measured sample is a UVCB product. As experiments are performed, the more volatile components present in the sample effuse readily, leading to a change in the composition of the condensed phase, which from one experiment to the next will exhibit a lower vapour pressure, since the composition becomes richer in the less volatile compounds.
The first experiment however, can be considered to reproduce the vapour pressure of the sample received from the customer. This experiment yielded a value of 1.6 mPa (0.000016 mbar = hPa) for the vapour pressure of the sample at 25 °C.
Reference
Results obtained in the measurement of the vapour pressures of Castor Oil, reaction with Soybean Oil.
Cell | m / mg | p / Pa | m / mg | p / Pa |
T / °C = 24.91 | t = 02h58m07s | T / °C = 29.92 | t = 22h37m16s | |
IV | 0.1 | 0.0012 | 0.5 | 0.0008 |
V | 0.2 | 0.0024 | 0.6 | 0.0009 |
VI | 0.1 | 0.0012 | 0.7 | 0.0011 |
T / °C = 48.94 | t = 20h09m50s | T / °C = 39.22 | t = 23h47m27s | |
IV | 0.5 | 0.009 | 0.1 | 0.0002 |
V | 0.2 | 0.0004 | 0.1 | 0.0002 |
VI | 0.1 | 0.0002 | ||
T / °C = 39.21 | t = 74h15m43s | |||
IV | 0.1 | 0.00005 | ||
V | 0.1 | 0.00005 | ||
VI | 0.1 | 0.00005 |
m : is the mass of effused compound
t : is the effused time
As seen in the graph, the result of the measurements is not a typical vapour pressure line. Instead, it can be verified from the chronological order of the experiments that the calculated value for the vapour pressure was always inferior to what would be expected considering the previous experiment. This is especially clear in the experiments 4 and 5, performed at the same temperature. The peculiarity of these results is due to the fact that the measured compound is a UVCB product. As the experiments are performed, the more volatile compounds effuse readily, leading to a change in the composition of the condensed phase, which in the next experiment will show a lower vapour pressure as the composition becomes richer in the less volatile compounds. The first experiment is therefore the only which can be considered to reproduce the vapour pressure of the sample received from the customer. Based on this value, vapour pressures for other temperatures can be estimated, although with limited precision. This can be done considering typical values of the enthalpies of vaporization, which determines the change of pressure with temperature. For the sample in question, the vapour pressure is expected to vary a 10 fold per 30 °C. Further measurements could be performed by a static method, which is not sensitive to the purity of to the composition of the samples, being therefore more suitable for UVCB products. However, given the results obtained in the first experiment with the Knudsen effusion method at 25 °C, the vapour pressure of the compound is too low to be quantified by the static method, unless the study is performed at a much higher temperature. A solution to the problem would be to repeat the experiments using in each experiment a new sample, rather than sample used in the previous experiment. The following table shows the value measured at the temperature of 25 °C, and values derived for other relevant temperatures, using on an empirical method based on a typical value of enthalpy of vaporization.
Vapour pressures of Castor Oil, reaction with Soybean Oil calculated for relevant temperatures. The values have an uncertainty of around 50%.
T /K | T / °C | p / mPa | p / mbar (hPa) |
293.15 | 20.0 | 1.0 (b) | 0.00001 |
298.15 | 25.0 | 1.6 (a) | 0.000016 |
323.15 | 50.0 | 13 (b) | 0.00013 |
328.15 | 55.0 | 20 (b) | 0.00020 |
a – value determined experimentally;
b – Value estimated from the experimental value obtained for 25 °C.
Description of key information
The vapour pressure of the substance was determined as 1.6 mPa (0.000016 mbar = hPa) at 25 °C
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure of the substance was determined using the Knudsen effusion method (mass-loss technique), according OECD guideline 104 and EU method A.4.
The quality of the apparatus was previously verified with the measurement of well known reference compounds.
Experiments were performed at temperatures between 25 °C and 49 °C. The results did not allow the establishment of an acceptable relation between the vapour pressure of the compound and temperature, due to the fact that the measured sample is a multi-component product. As experiments are performed, the more volatile components present in the sample effuse readily, leading to a change in the composition of the condensed phase, which from one experiment to the next will exhibit a lower vapour pressure, since the composition becomes richer in the less volatile compounds.
The first experiment however, can be considered to reproduce the vapour pressure of the sample received from the customer. This experiment yielded a value of 1.6 mPa (0.000016 mbar = hPa) for the vapour pressure of the sample at 25 °C.
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.