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Registration Dossier
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Reaction mass of Terpenes and Terpenoids, turpentine-oil, limonene fraction, 1-methyl-4-(1-methylethenyl)cyclohexene and turpentine-oil beta-pinene fraction terpenes, dimers and Terpenes and Terpenoids, turpentine-oil, limonene fraction, 1-methyl-4-(1-methylethenyl)cyclohexene and turpentine-oil beta-pinene fraction terpenes, trimers
EC number: 947-783-3 | 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:
- 05 - 08 September 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- 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
- Appearance/physical state: Amber colored liquid
- Batch No.of test material: AN-0400-113
- 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
- Test no.:
- #9
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 0.035 Pa
- Remarks on result:
- other: Mean of runs 1-9
- Conclusions:
- The vapour pressure of the test substance, Terpenes and Terpenoids, turpentine-oil, limonene fraction, polymers with 1-methyl-4-(1-methylethenyl)cyclohexene and turpentine-oil β-pinene fraction terpenes, was determined to be 3.5 x 10^-2 Pa at 25°C.
- Executive summary:
The vapour pressure of the test substance, Terpenes and Terpenoids, turpentine oil, limonene fraction, polymers with 1 -methyl-4 -(1 -methylethenyl)cyclohexene and turpentine-oil β-pinene fraction terpenes was determined using the 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.
A vapour pressure balance instrument was used in this study, where the mass and temperature readings were recorded automatically into a computer file. The temperature of the sample was controlled electronically. Opening the shutter above the sample oven after evacuating the system causes the escaping vapour jet to be directed at the scale pan, therefore any difference in mass readings with the orifice covered and uncovered is proportional to the vapour pressure at the given oven temperature. A preliminary run was undertaken over the temperature range of 25 -72°C to advise on a suitable temperature range to use for the determination. The sample was kept under vacuum for approximately 21.75 hours and then a sequence of runs was started. Temperature and pressure readings were taken between 55 -65°C with a one hour dwell at 55°C between runs.
A plot of Log 10 (vapour pressure [Pa]) versus reciprocal temperature (1/T [K]) for each of the runs was produced and then the vapour pressure was determined using the following equation: Log10 [Vp (Pa)] = slope/temperature (K) + intercept. A total of 10 runs were performed and the summary of the results can be seen in Table 1. The unshaded points on the graphs were not used as they were considered not linear. The first 9 runs were used to calcuate the definitive vapour pressure value for the test material, except for Run 10 since it produced a poor plot. The results may represent rounded-off values obtained by calculations based on the exact raw data.
The vapour pressure of the test substance was determined to be 3.5 x10^-2 Pa at a temperature of 25°C.
Reference
The test material did not change in appearance under the conditions used in the vapour pressure determination.
Description of key information
The vapour pressure of the test substance, Terpenes and Terpenoids, turpentine oil, limonene fraction, polymers with 1 -methyl-4 -(1 -methylethenyl)cyclohexene and turpentine-oilβ-pinene fraction terpenes was determined using the 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.
A vapour pressure balance instrument was used in this study, where the mass and temperature readings were recorded automatically into a computer file. The temperature of the sample was controlled electronically. Opening the shutter above the sample oven after evacuating the system causes the escaping vapour jet to be directed at the scale pan, therefore any difference in mass readings with the orifice covered and uncovered is proportional to the vapour pressure at the given oven temperature. A preliminary run was undertaken over the temperature range of 25 -72°C to advise on a suitable temperature range to use for the determination. The sample was kept under vacuum for approximately 21.75 hours and then a sequence of runs was started. Temperature and pressure readings were taken between 55 -65°C with a one hour dwell at 55°C between runs.
A plot of Log 10 (vapour pressure [Pa]) versus reciprocal temperature (1/T [K]) for each of the runs was produced and then the vapour pressure was determined using the following equation: Log10 [Vp (Pa)] = slope/temperature (K) + intercept. A total of 10 runs were performed and the summary of the results can be seen in Table 1. The unshaded points on the graphs were not used as they were considered not linear. The first 9 runs were used to calcuate the definitive vapour pressure value for the test material, except for Run 10 since it produced a poor plot. The results may represent rounded-off values obtained by calculations based on the exact raw data.
The vapour pressure of the test substance was determined to be 3.5 x10^-2 Pa at a temperature of 25°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.035 Pa
- at the temperature of:
- 25 °C
Additional information
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