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Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16-06-2014 to 17-06-2014

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Guideline study performed; not under GLP or GLP status unclear

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

GLP compliance:

not specified

Type of method:

dynamic method

Temp.:

25 °C

Vapour pressure:

0.421 hPa

Temp.:

25 °C

Vapour pressure:

42.1 Pa

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 = 7.6304 ; B = 2073.46 ; C = 230.0 ; T =Temperature, °C

 

Estimation

T (°C) = 206.5

Fp (°C) = 73

P(25) hPa = 0.421259

Conclusions:

The vapor pressure the test substance has been extrapolated to be 0.4213 hPa at 25°C or 42.13 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 = 7.6304, B = 2073.46, C = 230.0. According to the calculation of Antoine Parameters (A, B, C), the vapor pressure the test material has been extrapolated to be 0.4213 hPa at 25°C or 42.13 Pa at 25°C.

Description of key information

Vapor Pressure: 42.13 Pa at 25 °C, EU Method A.4, 2014

Key value for chemical safety assessment

Vapour pressure:

42.13 Pa

at the temperature of:

25 °C

Additional information

Key study: EU Method A.4, 2014 : 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 = 7.6304, B = 2073.46, C = 230.0. According to the calculation of Antoine Parameters (A, B, C), the vapor pressure the test material has been extrapolated to be 0.4213 hPa at 25°C or 42.13 Pa at 25°C.