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EC number: 273-381-6 | CAS number: 68958-92-9
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- March 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- July 2009 (REG (EC) No. 440/2008 amended by REG (EC) No. 761/2009)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- < 0.002 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- < 0.004 Pa
- Conclusions:
- The vapour pressure of the test item was <1.5 x 10E-3 Pa at the temperature of 20°C and <4.0 x 10E-3 Pa at the temperature of 25°C.
Reference
The slope of the log p versus 1/T curve for the test item in the range of 100°C - 130°C could not be determined since the coefficient of correlation (r) was < 0.99.
Since no accurate vapour pressure could be calculated from the obtained results, the weight losses of the test item were compared with the results of hexachlorobenzene at the same temperatures (i.e. 1.47 x 10E-3 and 3.97 x 10E-3 at 20°C and 25°C, respectively). Since the weight loss of the test item was lower than the weight loss of hexachlorobenzene, the vapour pressure of the test item is considered to be below the vapour pressure of hexachlorobenzene.
Representative weight loss curves for the test item and hexachlorobenzene are shown in the attacheddocument "S-930 – Vapour pressure.pdf".
Description of key information
<1.5 × 10E-3 Pa at 20°C and <4.0 × 10E-3 Pa at 25°C (EU A.4, OECD 104)
Key value for chemical safety assessment
Additional information
Vapour pressure <1.5 × 10E-3 Pa at the temperature of 20°C and <4.0 × 10E-3 Pa at the temperature of 25°C
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