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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
The data source is considered reliable since it is a well review database of vapor pressure values and Antoine coefficients of over 9,995 compounds. The data contained in the database are both experimentally determined and estimated based on methods developed by the author and other noted experts.
Principles of method if other than guideline:
no data
Type of method:
other: not reported
Temp.:
20 °C
Vapour pressure:
130.71 hPa
Remarks on result:
other: Calculated according to the Antoine equation.

The following Antoine coefficients are reported for the calculation of the Vapour pressure in temperature range

-14.2065 °C and 256.85 °C:

A = 7.07039

B = 1256.05

C = 227.304

Basing on the Antoine equation and on the reported coefficients, at the temperature of 20 °C 1,1,2 -trichloro-1,2 -difluoroethane assumes the vapour pressure of 98.04 mmHg (corresponding to 130.71 hPa).

Conclusions:
According to the source, at the temperature of 20 °C, the vapour pressure of 1,1,2 -trichloro-1,2 –difluoroethane is 130.71 hPa.
Executive summary:

The reference reports the Antoine coefficients for the calculation of the vapour pressure according to the formula:

log10 P(mmHg) = A - ( B / C + T(°C))

where:

A = 7.07039

B = 1256.05

C = 227.304

T = Temperature

According to the Antoine equation at the temperature of 20 °C 1,1,2 -trichloro-1,2 -difluoroethane assumes the vapour pressure of 98.04 mmHg (corresponding to 130.71 hPa).

Description of key information

The Vapour Pressure of 1,1,2-dichloro-1,2-difluoroethane at the temperature of 20 °C is 130.71 hPa.

Key value for chemical safety assessment

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

Additional information

A reliable reference is reported, which provides the Antoine coefficients for 1,1,2 -trichloro-1,2 -difluoroethane in the temperature range from -14 °C and 257 °C.

According to the Antoine equation, at the temperature of 20 °C the substance assumes the vapour pressure of 130.71 hPa.