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EC number: 953-553-3 | CAS number: -
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:
- From 13 January 2022 to 17 January 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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: isothermal thermogravimetry
- Specific details on test material used for the study:
- Chlorinated 45% w/w
- Key result
- Test no.:
- #2
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 0.005 Pa
- Key result
- Test no.:
- #2
- Temp.:
- ca. 20 °C
- Vapour pressure:
- ca. 0.003 Pa
- Conclusions:
- Vapour pressure at 20°C was 2.753 mPa.
Vapour pressure at 25°C was 4.580 mPa. - Executive summary:
The vapour pressure of test item was determined using Effusion method isothermal thermogravimetric analysis (TGA).
The Validation of the method was performed using a set of four reference substances. The constants C and D specific for the experimental arrangement were 1.1059 and 5.1067, respectively.
The evaporation rate of each reference substance and test item (VT) were calculated at elevated temperatures from the weight loss of the compounds.
The vapour pressure of the test item was performed in duplicate using TGA method. The vapor pressure of the test item at 20°C and 25°C were estimated by extrapolation and the vapor pressure results of the test item are presented below.
Temperature
(°C)
Vapour Pressure of the Test Item (ESTERI METILICI ACIDI GRASSI DA OLIO ESSEBIOCHLOR45)
[Pa]
[mPa]
R1
R2
R1
R2
20°C
2.862 × 10-3
2.643 × 10-3
2.862
2.643
25°C
4.753 × 10-3
4.407 × 10-3
4.753
4.407
Mean Vapour pressure at 20°C = 2.753 × 10-3 Pa (2.753 mPa)
Mean Vapour pressure at 25°C = 4.580 × 10-3 Pa (4.580 mPa)
From the TGA results, the repeatability of the obtained vapour pressure of the test item in duplicate was found to be < 30%.
Reference
Description of key information
Vapour pressure was 2.753 mPa and 4.580 mPa at 20°C and 25°C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.005 Pa
- at the temperature of:
- 25 °C
Additional information
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