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EC number: 947-773-9 | CAS number: -
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:
- 07 - 10 September 2017
- 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: vapour pressure balance
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Batch No.of test material: AN-0400-111
- Expiration date of the lot/batch: 01 January 2019
- Purity: 100% (UVCB)
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: approximately -20°C, under nitrogen, in the dark - Key result
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 0.175 Pa
- Remarks on result:
- other: Mean of run 8, 9 and 10
- Conclusions:
- The vapour pressure of the test material, Terpenes and terpenoids, turpentine-oil, alpha-pinene fraction, dimers, was determined using a vapour pressure balance to be 0.175 Pa at 25°C.
- Executive summary:
The vapour pressure of the test material, Terpenes and terpenoids, turpentine-oil, alpha-pinene fraction, was determined via a vapour pressure balance following a procedure compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No. 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
The temperature of the sample was controlled electronically and all mass and temperature readings were recorded automatically into a computer file. Once the system was evacuated, the opening of the shutter above the sample oven caused the escaping vapour jet to be directed at the scale pan. Therfore, any differences in mass readings with the orifice covered and uncovered is proportional to the vapour presure at the given oven temperature.
A preliminary run was conducted over the temperature range of 20 -41°C, in order to provide information for a suitable temperature range for the determination in the main run. A sample of the test material was held under vacuum for approximately 18 hours and then the sequence of runs were conducted. Temperature and pressure readigns were taken between 20 -30°C with a one-hour dwell at 20°C between runs. Equilibrium regarding the vapour pressure was assessed to have been reached over the final 3 runs (Run 8 -10), therefore these were used to calculate the definitive vapour pressure for the test material.
The vapour pressure of the test material, Terpenes and terpenoids, turpentine-oil, alpha-pinene fraction, dimers, was determined to be 0.175 Pa at 25°C.
Reference
Preliminary run - conducted over a temperature range of 20 -41°C to provide information for a suitable temperature range for the determination.
The test material did not change in appearance under the conditions used in the determination.
Description of key information
The vapour pressure of the test material, Terpenes and terpenoids, turpentine-oil, alpha-pinene fraction, was determined via a vapour pressure balance following a procedure compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No. 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
The temperature of the sample was controlled electronically and all mass and temperature readings were recorded automatically into a computer file. Once the system was evacuated, the opening of the shutter above the sample oven caused the escaping vapour jet to be directed at the scale pan. Therfore, any differences in mass readings with the orifice covered and uncovered is proportional to the vapour presure at the given oven temperature.
A preliminary run was conducted over the temperature range of 20 -41°C, in order to provide information for a suitable temperature range for the determination in the main run. A sample of the test material was held under vacuum for approximately 18 hours and then the sequence of runs were conducted. Temperature and pressure readigns were taken between 20 -30°C with a one-hour dwell at 20°C between runs. Equilibrium regarding the vapour pressure was assessed to have been reached over the final 3 runs (Run 8 -10), therefore these were used to calculate the definitive vapour pressure for the test material.
The vapour pressure of the test material, Terpenes and terpenoids, turpentine-oil, alpha-pinene fraction, dimers, was determined to be 0.175 Pa at 25°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.175 Pa
- at the temperature of:
- 25 °C
Additional information
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