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EC number: 224-167-6 | CAS number: 4221-98-1
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:
- 2016-05-13 to 2016-07-01
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2008
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- GLP compliance:
- no
- Type of method:
- dynamic method
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 2.35 hPa
- Temp.:
- 25 °C
- Vapour pressure:
- 3.18 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 12.53 hPa
- Conclusions:
- The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).
- Executive summary:
The vapour pressure of the test was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure.
The vapour pressure was measured in the temperature range of 51.1 to 116.6 °C.
The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C) using the dynamic method vapour-liquid equilibrium (VLE).
Reference
From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation
log10 p= A+(B/(C+T) )
p = vapour pressure in Pa
T = temperature in °C
can be derived by regression (Microsoft Excel) of the data points to
A = 10.1936
B = -2292.94
C = 273.15
Description of key information
The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).
Key value for chemical safety assessment
- Vapour pressure:
- 2.35 hPa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure. The vapour pressure was determined to be 2.35 hPa (20 °C), 3.18 hPa (25°C), 12.53 hPa (50°C).
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