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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study performed; not under GLP or GLP status unclear
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
not specified
Type of method:
dynamic method
Temp.:
25 °C
Vapour pressure:
0.196 hPa

After the regression the following Antoine’s parameters are obtained

P(T) = 10{ A - [B/(t+C)] } (mmHg);

 

P(T) = (1013/760)*10{ A - [B/(t+C)] } (hPa);

with:

A = 10.41 B = 4754.5 C = 397.6 T =Temperature, °C

 

Estimation

T (°C) = 233.2

Fp (°C) = 94

P(25) hPa = 0.196261

Conclusions:
The vapor pressure the test substance has been extrapolated to be 0.1962 hPa at 25°C or 19.62 Pa at 25°C.
Executive summary:

The vapour pressure was determined using EU Method A.4 and OECD 104. An extrapolation is made using an non-linear regression with the measuring points according to the permutation matrix of Fremann-Carrol and by Antoine equation to obtain the vapor pressure at 25°C. The boiling temperature is verified by the Siwoloboff method. The Antoine Parameters were determined to be A = 10.41 B = 4754.5 C = 397.6. According to the calculation of Antoine Parameters (A, B, C), the vapor pressure the test material has been extrapolated to be 0.1962 hPa at 25°C or 19.62 Pa at 25°C.

Description of key information

Vapor Pressure: 19.62 Pa at 25 °C, EU Method A.4, Firmenich SA 2001

Key value for chemical safety assessment

Vapour pressure:
19.62 Pa
at the temperature of:
25 °C

Additional information

Key study: EU Method A.4, 2001 : The vapour pressure was determined using EU Method A.4 and OECD 104. The Antoine Parameters were determined to be A = 10.41 B = 4754.5 C = 397.6. According to the calculation of Antoine Parameters (A, B, C), the vapor pressure the test material has been extrapolated to be 0.1962 hPa at 25°C or 19.62 Pa at 25°C.