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EC number: 202-992-2 | CAS number: 101-96-2
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:
- 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- Identification: N,N’-Di-sec-butyl-p-phenylenediamine
Appearance: Red/Brown oily liquid
Batch: W8A18GN001
Purity/Composition: See Certificate of Analysis
Test item storage: In refrigerator (2-8°C) protected from light
container flushed with nitrogen
Stable under storage conditions until: 22 January 2019 (expiry date) - Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0.026 Pa
- Test no.:
- #2
- Temp.:
- 20 °C
- Vapour pressure:
- 0 mm Hg
- Test no.:
- #3
- Temp.:
- 25 °C
- Vapour pressure:
- 0.05 Pa
- Test no.:
- #4
- Temp.:
- 25 °C
- Vapour pressure:
- 0 mm Hg
- Executive summary:
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C 25°C
[Pa] [mm Hg] [Pa] [mm Hg]
Test item 2.6 x10-2 2.0x10-4 5.0x10-2 3.8x10-4
Reference
The equation of the curve was: log PT = -4915 x 1/T + 15.19 (r = 0.996, n = 8).
Temperature [°C] |
Weightloss [µg/min] |
νT [g/cm2/h] |
logνT |
logPT |
PT [Pa] |
50
60
70
80 |
0.805770 0.835539 1.53184 1.72037 3.96057 3.71584 8.79572 7.59599 |
7.62x10 -5 9.97x10 -5 1.83x10 -4 2.05x10 -4 4.73x10 -4 4.44x10 -4 1.05x10 -3 9.07x10 -4 |
-4.02 -4.00 -3.74 -3.69 -3.33 -3.35 -2.98 -3.04 |
0.00 0.02 0.35 0.42 0.88 0.85 1.32 1.24 |
0.99 1.0 2.3 2.6 7.6 7.0 21 17 |
Vapour Pressure of the Test Item
Temperature [°C] |
logPT |
PT [Pa] |
PT [mmHg] |
20 25 |
-1.58 -1.30 |
2.6x10 -2 5.0x10 -2 |
2.0x10 -4 3.8x10 -4 |
The isothermal TGA effusion method was applied for the determination of the vapour
pressure ofN,N’-Di-sec-butyl-p-phenylenediamine.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C 25°C
[Pa] [mm Hg] [Pa] [mm Hg]
Test item 2.6 x10-2 2.0x10-4 5.0x10-2 3.8x10-4
Description of key information
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C 25°C
[Pa] [mm Hg] [Pa] [mm Hg]
Test item 2.6 x10-2 2.0x10-4 5.0x10-2 3.8x10-4
Key value for chemical safety assessment
- Vapour pressure:
- 0.05 Pa
- at the temperature of:
- 25 °C
Additional information
The objective of this study was to determine the Vapour Pressure of N,N’-Di-sec-butyl-p-phenylenediamine by Isothermal Thermogravimetry. The isothermal TGA effusion method was applied for the determination of the vapour pressure of N,N’-Di-sec-butyl-p-phenylenediamine.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C 25°C
[Pa] [mm Hg] [Pa] [mm Hg]
Test item 2.6 x10-2 2.0x10-4 5.0x10-2 3.8x10-4
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