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EC number: 801-260-5 | CAS number: 96383-55-0
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:
- 17 Jun - 5 Sep 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Ministerie van Volksgezondheid, Welzijn en Sport, Den Haag
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 4.9 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 8.5 Pa
Reference
Results of the isothermal TGA analysis:
Temperature [°C] |
Weight loss [µg/min] |
vT[mg/cm2/h] |
log vT |
log P |
P [Pa] |
40 |
20.88 |
2.49 |
-2.60 |
1.58 |
38 |
20.02 |
2.39 |
-2.62 |
1.56 |
36 |
|
50 |
53.17 |
6.35 |
-2.20 |
2.00 |
100 |
52.85 |
6.31 |
-2.20 |
2.00 |
100 |
|
60 |
121.1 |
1.45 |
-1.84 |
2.38 |
240 |
117.9 |
1.41 |
-1.85 |
2.37 |
230 |
|
70 |
253.6 |
3.03 |
-1.52 |
2.72 |
520 |
241.7 |
2.89 |
-1.54 |
2.70 |
500 |
On the basis of these results in the temperature range 30 °C - 70 °C, the following equation was obtained:
log P = -4078 * 1/T + 14.60 (r = 0.9992, n = 8, T in [K], P in [Pa])
Extrapolation to temperatures 20 °C and 25 °C gives log P values of 4.9 and 8.5, respectively, and values of P in [Pa] as given above.
Description of key information
4.9 Pa at 20 °C
8.5 Pa at 25 °C
Key value for chemical safety assessment
- Vapour pressure:
- 4.9 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the substance was determined using isothermal TGA effusion method according to EU method A.4 and guidelines OECD 104 and OPPTS 830.7950.
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