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EC number: 239-556-6 | CAS number: 15520-10-2
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:
- 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study (EU A.4 / OECD TG 104).
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Temp.:
- 20 °C
- Vapour pressure:
- 26.1 Pa
- Conclusions:
- The vapour pressure of the test substance at 20 °C is 26.1 Pa.
- Executive summary:
The vapour pressure of the test substance was determined according to EU A.4 / OECD TG 104 by the effusion method (loss of weight). The vapour pressure of the test substance at 20 °C is 26.1 Pa.
Reference
The results of the isothermal TGA analysis are given in Table 2.
Table 2: Results of the isothermal TGA analysis
Temperature Weight loss (microg/min) vT(g/cm2/h) log vT
40 °C 64.36 7.68 × 10-3 -2.11
57.15 6.82 × 10-3 -2.17
50 °C 121.0 1.44 × 10-2 -1.84
119.5 1.43 × 10-2 -1.85
60 °C 230.0 2.75 × 10-2 -1.56
231.5 2.76 × 10-2 -1.56
The log vT of the test substance is plotted as a function of the reciprocal temperatures.
The coefficient of correlation (r) was > 0.99.
Extrapolation of the curve to 20 °C resulted in a value of -2.80 for the log vT, 20 of the test substance.
Fitting this value in the vapour pressure regression curve from the reference substances, a vapour pressure of 26.1 Pa = 0.196 mm Hg was obtained.
Description of key information
The vapour pressure of the test substance at 20 °C is 26.1 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 26.1 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test substance was determined according to EU A.4 / OECD TG 104 by the effusion method (loss of weight). The vapour pressure of the test substance at 20 °C is 26.1 Pa.
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