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EC number: 204-024-4 | CAS number: 113-24-6
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- from 2017-10-17 to 2017-10-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 °C:
for 20 °C: 1.119E-10 Pa
for 25 °C: 3.467E-10 Pa - Executive summary:
A study was conducted according to OECD TG 104 and Regulation (EC) No. 440/2008 (REACH), method A.4 in order to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures from 120 °C to 160 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 125 °C to 160 °C were used. The vapour pressures for 20 °C and 25 °C were calculated by extrapolation of the measured vapour pressure curve. The vapour pressure of the test item was determined to be 1.119 x 10-10 Pa at 20 °C and 3.467 x 10-10 Pa at 25 °C.
Reference
The vapour pressure was measured in the temperature range of 120 to 160 °C. For the evaluation the vapour pressure values in the range of 125 °C to 160 °C were used. The measured vapour pressure values together with the measured temperatures are listed in Table 1.
Table 1: Results of effusion method
| Stage No. | Temperature (°C) |
Δm/Δt (mg/min) | Vapour pressure (Pa) |
| 1 | 125 | 2.9909E-05 | 9.8942E-3 |
| 2 | 130 | 4.5083E-05 | 1.5007E-2 |
| 3 | 135 | 4.2187E-05 | 1.4130E-2 |
| 4 | 140 | 6.5097E-05 | 2.1937E-2 |
| 5 | 145 | 1.1058E-04 | 3.7489E-2 |
| 6 | 150 | 2.0798E-04 | 7.0928E-2 |
| 7 | 155 | 7.4460E-04 | 2.5543E-1 |
| 8 | 160 | 1.7909E-03 | 6.1793E-1 |
E-x : *10-x
Description of key information
The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20 °C:
for 20 °C: 1.119 x 10-10 Pa
for 25 °C: 3.467 x 10-10 Pa
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
A study was conducted according to OECD TG 104 and Regulation (EC) No. 440/2008 (REACH), method A.4 in order to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures from 120 °C to 160 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 125 °C to 160 °C were used. The vapour pressures for 20 °C and 25 °C were calculated by extrapolation of the measured vapour pressure curve. The vapour pressure of the test item was determined to be 1.119 x 10-10 Pa at 20 °C and 3.467 x 10-10 Pa at 25 °C (reference 4.6-1).
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