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EC number: 202-235-6 | CAS number: 93-28-7
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:
- Experimental dates: October 17, 2017 to January 11, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was conducted according to an internationally recognized method, and under GLP. No deviation was reported. The test substance is adequately characterised. Therefore full validation applies.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Regulation (EC) No. 440/2008, as modified by Reg.(EC) No 761/2009,
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- inspected on 20 & 21 June 2017 / signed on 04 September 2017
- Type of method:
- effusion method: Knudsen cell
- Specific details on test material used for the study:
- The test item was tested as received.
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.041 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.09 Pa
- Conclusions:
- Low volatility (based on volatility bands criteria for occupational exposure (Chesar / ECETOC TRA), << 500 Pa).
- Executive summary:
The vapour pressure of the test substance was measured under GLP according to OECD 104 / EU A4 guideline, effusion (Knudsen cell) method.
Eight measurements were recorded between 10 and 40°C.
The vapour pressure at 20°C was interpolated from the regression with the Antoine equation at 0.041 Pa.
Reference
The corresponding measured vapour pressures are listed in the table below:
| Temperature (°C) | Vapour Pressure (hPa) |
| 10 | 7.1 E-5 |
| 15 | n.e. |
| 20 | n.e. |
| 25 | 1.0 E-3 |
| 30 | 2.0 E-3 |
| 35 | 3.7 E-3 |
| 40 | 6.6 E-3 |
| 30 | 2.3 E-3 |
n.e./ not evaluable due to technical malfunction
The values for 20 and 25°C are calculated by interpolation, using the Antoine equation:
logVP (hPa) = 16.71075 - 5890.87 / (273.15 + T[°C])
(Using a value of 273.15 for constant C results in a linear dependency of log(VP) of the inverse temperature 1/T (in K). This is verified only for a limited temperature range.)
After the measurement a mass loss of approx. 39 % (w/w) was determined.
Description of key information
Low volatility.
Key value for chemical safety assessment
- Vapour pressure:
- 0.041 Pa
- at the temperature of:
- 20 °C
Additional information
A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study, and the result is retained as key data.
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.
