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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
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 Version
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
No. 440/2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
dynamic method
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 hPa
Remarks on result:
other: The values for 20, 25 and 50 °C are calculated, using the Antoine constants
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 hPa
Remarks on result:
other: The values for 20, 25 and 50 °C are calculated, using the Antoine constants
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
0.012 hPa
Remarks on result:
other: The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C

The vapour pressure was measured with the dynamic method in the temperature range of 125 °C to 245 °C. The measured vapour pressures at the corresponding temperatures are listed in following Table:

 Temperature / °C  Vapour pressure / hPa
 125.3

 7.9
 144.2  20.0
 163.8  49.5
 192.3 146.0 
 208.8  249.3
 228.0  495.2
 244.9  695.8
 222.1  399.0
 197.8  194.0
 176.5  96.6

The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as

shown in Table 2.

Table 2: Antoine parameters and extrapolated vapour pressures

 T/°C  p/hPa   log(p/hPa) = A+B/(C+T[°C])
 20  9.9E-5  A = 6.64455
 25  2.6E-4  B = -1320.38
 50  1.2E-2  C = 103.99
Conclusions:
Vapour pressure: 9.9E-5 hPa at 20°C
Executive summary:

The vapour pressure was determined following the dynamic method according to OECD guideline 104.

Vapour pressure: 9.9E-5 hPa at 20°C

The laboratory complied with a GLP standard according §19b ChemG certified last 17./18.06.2014.

Description of key information

Vapour pressure extapolated from measurements beetween 125 to 244°C:

9.9E-5 hPa at 20°C

Key value for chemical safety assessment

Vapour pressure:
0 hPa
at the temperature of:
20 °C

Additional information

The vapour pressure was determined following the dynamic method according to OECD guideline 104.

Vapour pressure extrapolated: 9.9E-5 hPa at 20°C

The laboratory complied with a GLP standard according §19b ChemG certified last 17./18.06.2014.

Study was conducted as the result from supporting study (OXEA 2010: 3 hPa@20°C) strongly devited from VP measurement data of homologous aldehydes.