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EC number: 214-590-4 | CAS number: 1156-51-0
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:
- May - September 2016
- 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: isothermal thermogravimetry
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Test Substance Name: LZ 514
- Source: Lonza Ltd, Visp/Switzerland
- Lot/batch No.of test material: 5011
- Expiration date of the lot/batch: 2nd December 2017
- Manufacture date: 3rd December 2015
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage conditions: Controlled room temperature (15-25 ºC, below 70 RH%), protected from light and humidity.
- Stability under test conditions: stable
- Safety precautions: Routine safety precautions (lab coat, gloves, safety glasses, face mask) for unknown materials were applied to assure personnel health and safety. - Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: mean of three determinations
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: mean of three determinations
- Remarks on result:
- not measured/tested
- Transition / decomposition:
- no
- Remarks on result:
- not measured/tested
- Conclusions:
- The vapour pressure of the test item was determined above the melting range and was: at 20 °C: 6.35 × 10-6 Pa (mean of three determinations).
- Executive summary:
The study was performed according EU testing method A.4. The isothermal thermogravimetric effusion method was chosen. This method is suitable for substances with vapour pressures as low as 10 Exp.-10 Pa and with purity as close as possible to 100% to avoid the misinterpretation of measured weight losses. The vapour pressure of the test item was determined above the melting range and was: at 20 °C: 6.35 × 10-6 Pa (mean of three determinations).
Reference
The melting range of the test item is 80°C to 82°C. Below the melting range, the weight loss was indeed observed, but the data could not be evaluated. The slope of the weight loss was not stable and not reproducible. The results could not be evaluated, due to the test item properties. The vapour pressure cannot be determined with the sufficient accuracy under these conditions. The evaluation of the vapour pressure was done applying temperatures between 140°C and 170°C (above the melting range).
The determination was performed above the melting range of the test item; these values however are expected to be overestimated, because it was determined from molten material.
Description of key information
The study was performed according EU testing method A.4. The isothermal thermogravimetric effusion method was chosen. The vapour pressure of the test item was determined above the melting range and was: at 20 °C: 6.35 × 10-6 Pa (mean of three determinations).
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 20 °C
Additional information
Source: GLP-report
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