Reaction mass of fatty acids, montan-wax, 1-methyl-1,3- propanediyl esters and fatty acids, montan-wax, ethylene esters and fatty

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12-18 Jan 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Guideline study (EU A.4; OECD 104)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2011

Report date:

2011

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

Montan waxes, type KPS

IUPAC Name:

Montan waxes, type KPS

Details on test material:

Test item: Licowax KPS FL
Storage conditions: room temperature

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

0 Pa

Any other information on results incl. tables

The vapour pressure was measured in the temperature range of 22 °C to 124 °C. Above 73 °C a vapour pressure could be measured. The measured vapour pressures at the corresponding temperatures are listed in the following table:

Temperature/°C     Vapour pressure/hPa

72.6                          1.9 x 10^-5

76.6                          2.7 x 10^-5

79.4                          3.2 x 10^-5

82.7                          4.3 x 10^-5

89.7                          1.0 x 10^-4

94.3                          1.3 x 10^-4

98.7                          1.7 x 10^-4

103.0                       2.3 x 10^-4

106.5                       2.8 x 10^-4

112.4                       4.2 x 10^-4

118.9                      8.2 x 10^-4

123.6                      1.2 x 10^-3

The values for 20, 25 and 50 °C are calculated from the measurement curve, using the Antoine constants A, B and C.

^{T/°C       p/hPa           log(p/hPa)=A+B/(C+T[°C])}

^{20          6.39E-08                              A=9.01057}

^{25          1.19E-07                              B=-4750.52}

^{50          2.04E-06                              C=273.15}

 Final Results

Vapour Pressure

The calculated vapour pressure values are extrapolated

T/°C  p/hPa          p/Pa

20     6.4x10^-8        6.4x10^-6

25     1.2x10^-7        1.2x10^-5

50     2.0x10^-6        2.0x10^-4

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the test substance is 0.000012 Pa at 25 °C.

Executive summary:

The vapour pressure of the test substance was determined in a guideline study (EU A.4; OECD TG 104) with a vapour pressure balance (effusion method). The vapour pressure is 0.000012 Pa at 25 °C.