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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1999
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Well documented study study performed with deviations: no details on specification of test material
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Estimation of saturation vapour pressure using static device (Kasehgari et.al, 1993; Mokbel et.al, 1995 and Rudakov and Korotov, 1937)
GLP compliance:
not specified
Type of method:
static method
Key result
Temp.:
298 K
Vapour pressure:
200 Pa
Remarks on result:
other: Experimental value

Table 1: Experimental vapour pressure data of d-limonene at various temperature

Temperature (K)

Vapour pressure (Pa)

243.5

1.91

253.4

5.26

263.3

13.33

273.2

31.02

283.2

68.48

333.1

1534.30

341.7

2350.11

343.0

2509.30

351.8

3763.40

361.7

5814.15

371.7

8748.69

381.6

12 725.04

391.6

18 125.15

401.7

25 369.40

411.7

34 732.08

421.7

46 629.51

431.7

61 708.75

441.7

80 498.95

451.7

103 784.84

461.7

131 610.60

Table 2: Estimated saturated vapour pressures values of d-limonene at 298 K

Method

Estimated value

% Error (From experimental value)

Antoine-Grain

220

10%

Watson’s method

173

-14%

Lee–Kesler’s method

259

30%

Gomez-Thodos’ method

279

40%

Grain’s method

135

-33%

Mackay’s method

209

5%

Conclusions:
The experimental saturated vapour pressure of d-limonene was found to be 200 Pa at 298 K.
Executive summary:

The saturated vapour pressure of d-limonene was measured using a static method at different temperatures from 223 to 468 K and Antoine’s constants were determined from experimental values to calculate the vapour pressure at a given temperature.

The measured results were compared with those obtained using different estimation methods like Antoine-Grain, Watson, Lee-Kesler, Gomez-Thodos, The experimental saturated vapour pressure of d-limonene was found to be 200 Pa at 298 K.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1999
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Documentation insufficient for assessment: no certificate of analysis of the test substance; test performed at one temperature only; individual analytical determinations not reported
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
Stripping method
GLP compliance:
not specified
Temp.:
25 °C
Vapour pressure:
213 Pa
Remarks on result:
other: ± 29 Pa

Literature data:

- Experimental value: 267 Pa at 24 °C (Simon et al., 1995); 187 Pa (Massaldi and King, 1973)

- Estimated value: 223 Pa (Daubert and Danner, 1989); 205 Pa (ACD/PVAP Web Service V.2.6, 1995)

Conclusions:
The vapor pressure of R-(+)-limonene at 25 °C was determined to be 213 ± 29 Pa.
Executive summary:

A study was conducted to determine the vapor pressure of R-(+)-limonene using stripping method.

 

The vapor pressure of R-(+)-limonene at 25 °C was determined to be 213 ± 29 Pa.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
no data
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
Method followed unknown, data from secondary literature
GLP compliance:
not specified
Type of method:
other: no data
Temp.:
20 °C
Vapour pressure:
190 Pa

None

Conclusions:
The vapour pressure of d-limonene is 190 Pa at 20 °C.
Executive summary:

The vapour pressure of d-limonene is 190 Pa at 20 °C.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1998
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Documentation insufficient for assessment: no certificate of analysis of the test substance, reported method is not in the list of OECD recommended methods of estimation
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
Method: Test substance was placed in small glass cup, suspended above water, set into a flask. After saturation, the gas samples were extracted with isooctane solution and analysed using GC. Vapor pressure was calculated from its gas-phase concentration, using the ideal gas equation.
GLP compliance:
not specified
Type of method:
other: flask method
Temp.:
23.5 °C
Vapour pressure:
202 Pa
Temp.:
6 °C
Vapour pressure:
18.4 Pa

Estimated vapor pressure of limonene at room temperature (23.5 °C):

- Model A: estimated using Banerjee's model (Yalkowsky and Banerjee, 1992) = 272 Pa

- Model B: estimated using SPARC model (Hilal et al., 1994) = 193 Pa

Conclusions:
The experimental vapour pressure of limonene was 202 Pa (at 23.5 °C) and 18.4 Pa (at 6 °C). Estimated vapor pressure values of limonene at 23.5 °C were 272 Pa (Banerjee's model) and 193 Pa (SPARC model).
Executive summary:

A study was conducted with fask method to determine the vapour pressure of limonene. The test substance was placed in small glass cup, suspended above water, set into a shaking flask. After saturation, the gas samples were extracted with isooctane solution and analysed using GC. Vapor pressure was calculated from its gas-phase concentration, using the ideal gas equation.

 

The experimental vapour pressure of limonene was 202 Pa (at 23.5 °C) and 18.4 Pa (at 6 °C). Estimated vapor pressure values of limonene at 23.5 °C were 272 Pa (Banerjee's model) and 193 Pa (SPARC model).

Description of key information

The vapour pressure of d-limonene at 25 °C is 200 Pa.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of d-limonene, measured using a static method in a well-documented study, was chosen as key value. It was supported by several other experimental data which were all consistent with this result.