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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
Study period:
The study was conducted between 25 March 2018 and 04 April 2018.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. QA statement)
Type of method:
isoteniscope
Specific details on test material used for the study:
Identification: PG-RAW-0004
Appearance/Physical state: Clear colorless liquid
Storage conditions: Approximately 4 °C, in the dark
Key result
Temp.:
25 °C
Vapour pressure:
38.4 Pa

Recorded temperatures, pressure readings and the resulting calculated values of vapor pressure are shown in the following tables:

Run 1 - Vapor Pressure Data

LHS*Column (cmHg)

RHS Column (cmHg)

Temperature (°C)

Vapor Pressure (Pa)

Temperature (K)

Reciprocal Temperature (1/K)

Log10Vp

51.4

30.7

147.8

27597.73

420.95

0.002375579

4.440873366

51.2

31.0

146.8

26931.12

419.95

0.002381236

4.430254390

50.9

31.2

146.1

26264.51

419.25

0.002385212

4.419369246

50.6

31.5

145.0

25464.57

418.15

0.002391486

4.405936387

50.2

31.9

144.0

24397.99

417.15

0.002397219

4.387354110

50.0

32.2

143.0

23731.38

416.15

0.002402980

4.375323022

49.7

32.5

142.1

22931.45

415.25

0.002408188

4.360431467

49.3

32.8

141.1

21998.19

414.25

0.002414001

4.342386964

49.0

33.2

140.1

21064.93

413.25

0.002419843

4.323560107

48.7

33.5

138.9

20265.00

412.05

0.002426890

4.306746608

48.3

33.9

137.4

19198.42

410.55

0.002435757

4.283265512

47.8

34.3

135.8

17998.52

408.95

0.002445287

4.255236789

47.4

34.7

134.4

16931.94

407.55

0.002453687

4.228706741

47.0

35.1

133.1

15865.36

406.25

0.002461538

4.200449982

46.7

35.4

131.8

15065.43

404.95

0.002469441

4.177981464

46.4

35.7

130.5

14265.49

403.65

0.002477394

4.154286798

46.1

36.0

129.0

13465.56

402.15

0.002486634

4.129224394

45.7

36.3

127.6

12532.30

400.75

0.002495321

4.098030874

45.4

36.7

126.1

11599.05

399.25

0.002504696

4.064422273

45.2

36.9

125.0

11065.76

398.15

0.002511616

4.043981113

*LHS – Left Hand Side
 RHS – Right Hand Side

A plot of Log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run1gives the following statistical data using an unweighted least squares treatment.

Slope                                      -2.94 x 103
Standard error in slope           29.8

Intercept                                11.4
Standard error in intercept     7.26 x 10-2

The results obtained indicate the following vapor pressure relationship:

Log10(Vp (Pa)) =-2.94 x 103/temp(K) + 11.4

The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 1.58.

Run 2 - Vapor Pressure Data

LHS*Column (cmHg)

RHS Column (cmHg)

Temperature (°C)

Vapor Pressure (Pa)

Temperature (K)

Reciprocal Temperature (1/K)

Log10Vp

51.0

31.2

147.2

26397.83

420.35

0.002378970

4.421568210

50.8

31.4

146.5

25864.54

419.65

0.002382938

4.412704750

50.6

31.6

145.6

25331.25

418.75

0.002388060

4.403656621

50.3

31.8

144.8

24664.64

417.95

0.002392631

4.392074749

50.0

32.1

143.7

23864.70

416.85

0.002398944

4.377756051

49.7

32.5

142.9

22931.45

416.05

0.002403557

4.360431467

49.3

32.8

141.7

21998.19

414.85

0.002410510

4.342386964

49.0

33.1

140.9

21198.26

414.05

0.002415167

4.326300144

48.7

33.3

139.8

20531.64

412.95

0.002421601

4.312423741

48.4

33.7

138.7

19598.39

411.85

0.002428068

4.292220355

48.2

33.9

137.7

19065.10

410.85

0.002433978

4.280239058

47.7

34.4

136.4

17731.88

409.55

0.002441704

4.248754661

47.4

34.7

135.2

16931.94

408.35

0.002448880

4.228706741

47.0

35.1

133.9

15865.36

407.05

0.002456701

4.200449982

46.7

35.4

132.7

15065.43

405.85

0.002463965

4.177981464

46.5

35.6

131.5

14532.14

404.65

0.002471271

4.162329518

46.3

35.8

130.3

13998.85

403.45

0.002478622

4.146092319

45.9

36.2

129.0

12932.27

402.15

0.002486634

4.111674754

45.7

36.4

128.0

12398.98

401.15

0.002492833

4.093385969

45.4

36.7

126.6

11599.05

399.75

0.002501563

4.064422273

*LHS – Left Hand Side
 RHS – Right Hand Side

A plot of Log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run2gives the following statistical data using an unweighted least squares treatment.

Slope                                      -2.94 x 103
Standard error in slope           31.8

Intercept                                11.4
Standard error in intercept     7.74 x 10-2

The results obtained indicate the following vapor pressure relationship:

Log10(Vp (Pa)) =-2.94 x 103/temp(K) + 11.4

The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 1.56

Run 3 – Vapor Pressure Data

LHS*Column (cmHg)

RHS Column (cmHg)

Temperature (°C)

Vapor Pressure (Pa)

Temperature (K)

Reciprocal Temperature (1/K)

Log10Vp

50.8

31.4

144.2

25864.54

417.35

0.002396070

4.412704750

50.4

31.8

143.0

24797.96

416.15

0.002402980

4.394415964

50.0

32.1

141.7

23864.70

414.85

0.002410510

4.377756051

49.7

32.4

140.6

23064.77

413.75

0.002416918

4.362949123

49.5

32.7

139.7

22398.16

412.85

0.002422187

4.350212302

49.0

33.1

138.4

21198.26

411.55

0.002429838

4.326300144

48.8

33.4

137.6

20531.64

410.75

0.002434571

4.312423741

48.5

33.7

136.1

19731.71

409.25

0.002443494

4.295164736

48.1

34.0

134.9

18798.45

408.05

0.002450680

4.274122133

47.8

34.4

133.7

17865.20

406.85

0.002457908

4.252007818

47.4

34.8

132.5

16798.62

405.65

0.002465179

4.225273565

47.0

35.1

131.2

15865.36

404.35

0.002473105

4.200449982

46.8

35.4

130.0

15198.75

403.15

0.002480466

4.181807871

46.5

35.6

129.0

14532.14

402.15

0.002486634

4.162329518

46.3

35.9

128.0

13865.53

401.15

0.002492833

4.141936359

46.0

36.1

127.0

13198.91

400.15

0.002499063

4.120538215

45.8

36.4

126.1

12532.30

399.25

0.002504696

4.098030874

45.6

36.5

125.0

12132.34

398.15

0.002511616

4.083944412

45.3

36.8

123.6

11332.40

396.75

0.002520479

4.054321946

45.0

37.1

122.2

10532.47

395.35

0.002529404

4.022530111

*LHS – Left Hand Side
 RHS – Right Hand Side

A plot of Log10(vapor pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run3gives the following statistical data using an unweighted least squares treatment.

Slope                                     -2.94 x 103
Standard error in slope           37.2

Intercept                                11.5
Standard error in intercept     9.15 x 10-2

The results obtained indicate the following vapor pressure relationship:

Log10(Vp (Pa)) =-2.94 x 103/temp(K) + 11.5

The above yields a vapor pressure (Pa) at 298.15 K with a common logarithm of 1.61.

Summary of Results

The values of vapor pressure at 25 °C extrapolated from each graph are summarized in the following table:

Summary of Vapor Pressure Data

Run

Log10[Vp(25 ºC)]

1

1.58

2

1.56

3

1.61

Mean

1.58

Vapor Pressure

38.37 Pa
The test item did not change in appearance under the conditions used in the determination.
Conclusions:
The vapour pressure of the PG-RAW-0004 was investigated using the isoteniscope method according to OECD TG 104, in a reliable GLP study. The vapour pressure of PG-RAW-0004 was found to be 38.4 Pa at 25 °C.
Executive summary:

The vapour pressure of the PG-RAW-0004 was investigated using the isoteniscope method according to OECD TG 104, in a reliable GLP study. The vapour pressure of PG-RAW-0004 was found to be 38.4 Pa at 25 °C.

Description of key information

The vapour pressure of the PG-RAW-0004 was investigated using the isoteniscope method according to OECD TG 104, in a reliable GLP study. The vapour pressure of PG-RAW-0004 was found to be 38.4 Pa at 25 °C.

Key value for chemical safety assessment

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

Additional information