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EC number: 603-101-3 | CAS number: 125962-78-9
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:
- 2003-04-29
- 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:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 0 hPa
- Conclusions:
- The vapour pressure of the test item was found to be 1.1 x 10-8 hPa at 25 °C.
- Executive summary:
The vapour pressure of the test item was determined using the Effusion method: Vapour pressure balance according to OECD Test Guideline 104 and EU method, A.4. The vapour pressure was determined in the temperature range of 32 °C to 126 °C. The logarithm of the vapour pressure was plotted as a function of the inverse temperature 1/T. The vapour pressure at 20, 25 and 50 °C was determined by linear regression of the measured values. The vapour pressure of the test item was found to be 4.4 × 10-9, 1.1 x 10-8 and 7.3 × 10-7 hPa at 20, 25 and 50 °C.
Reference
The vapour pressure was measured in the temperature range of 32 °C to 126 °C. No signal was observed up to a of temperature of 66 °C, meaning that the vapour pressure in this range was below the lower detection limit of 10-5 hPa. The vapour pressure was measured at the following temperatures: 32.1, 41.1, 45.5, 45.9, 51.5, 57.3, 65.7 and 66.0. For every temperature the vapour pressure of the test item was <10-5 hPa. Above 72 °C a vapour pressure could be measured.
Temperature / °C | Vapour pressure / hPa |
72.5 | 2.1 x 10-5 |
72.8 | 2.1 x 10-5 |
80.0 | 4.3 x 10-5 |
85.0 | 9.8 x 10-5 |
90.0 | 1.9 x 10-4 |
95.7 | 3.5 x 10-4 |
101.6 | 6.5 x 10-4 |
107.4 | 1.4 x 10-3 |
115.6 | 3.4 x 10-3 |
123.2 | 7.2 x 10-3 |
127.8 | 1.3 x 10-3 |
log (p/hPa) = A + B/(C+T[°C])
A = 15.59411, B = -7022.44, C =273.15
Description of key information
The vapour pressure of the test item was found to be 1.1 x 10-8 hPa at 25 °C (reference 4.6-1).
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure of the test item was determined using the Effusion method: Vapour pressure balance according to OECD Test Guideline 104 and EU method, A.4. The vapour pressure was determined in the temperature range of 32 °C to 126 °C. The logarithm of the vapour pressure was plotted as a function of the inverse temperature 1/T. The vapour pressure at 20, 25 and 50 °C was determined by linear regression of the measured values. The vapour pressure of the test item was found to be 4.4 × 10-9, 1.1 x 10-8 and 7.3 × 10-7 hPa at 20, 25 and 50 °C.
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