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EC number: 830-582-9 | CAS number: 1951440-04-2
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:
- 24 December 2018 - 28 February 2019
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- Identification: 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy)benzene)
Batch (Lot) Number: AS455433
Expiry date: 01 November 2020 (retest date) (taken from label)
Physical Description: Colourless to light yellow viscous liquid
Purity/Composition: 98.5%
Storage Conditions: At room temperature protected from light - Key result
- Temp.:
- ca. 20 °C
- Vapour pressure:
- 0.002 Pa
- Key result
- Temp.:
- ca. 25 °C
- Vapour pressure:
- 0.004 Pa
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy)benzene).
The vapour pressure of the test item at 20°C (293K) was <1.5 x 10^-3 Pa / < 1.1 x 10^-5 mm Hg
The vapour pressure of the test item at 25°C (298K) was < 4.1 x 10^-3 Pa / < 3.1 x 10^-5 mm Hg - Executive summary:
The vapour pressure of the test item (PT) was determined by the isothermal thermogravimetric effusion method. The method is validated in the range 10^-8 - 10^3 Pa using a set of five reference substances with known vapour pressures. The validity of the method was verified maximum one month before this study using hexachlorobenzene as reference control substance. Since the logarithm of the evaporation rate at 20°C (log vT, 20) deviated < 10% from the average value obtained during the validation test, it was possible to apply the constants obtained with the validation test for the determination of the vapour pressure of the test item.
The vapour pressure of the test item at 20°C (293K) was <1.5 x 10^-3 Pa / < 1.1 x 10^-5 mm Hg
The vapour pressure of the test item at 25°C (298K) was < 4.1 x 10^-3 Pa / < 3.1 x 10^-5 mm Hg
Reference
Description of key information
The isothermal TGA effusion method was applied for the determination of the vapour pressure of 4,4'-(4-methylpentane-2,2-diyl)bis((heptyloxy)benzene).
The vapour pressure of the test item at 20°C (293K) was <1.5 x 10^-3 Pa / < 1.1 x 10^-5 mm Hg
The vapour pressure of the test item at 25°C (298K) was < 4.1 x 10^-3 Pa / < 3.1 x 10^-5 mm Hg
Key value for chemical safety assessment
- Vapour pressure:
- 0.002 Pa
- at the temperature of:
- 20 °C
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