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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18-Sep-2017 to 02-Oct-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
Batch: CVR 83297
Purity/Composition: 97.2%
Test item storage: At room temperature protected from light
Stable under storage conditions until: 27 December 2018 (expiry date)
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
< 0 Pa

Weight losses were observed from the start of the experiments. Weight decreased non-linearly during isothermal steps, however, this was most likely due to evaporation of minor volatile components or (partial) reaction and/or decomposition.

In the range of 200 °C and 230 °C a log p versus 1/T curve for the test item could not be determined since the coefficient of correlation (r) was < 0.99. This was most likely due to the fact that the test item is a complex substance.

Since no accurate vapour pressure could be calculated from the obtained results, the weight losses were compared with the results of benzo(ghi)perylene (a reference substance). Since the weight loss of the test item was lower than the weight loss of the reference compound (except at 200 °C, where it was comparable) the vapour pressure of the test item is considered to be below the vapour pressure of benzo(ghi)perylene.

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Epoxypropyl neodecanoate, oligomeric reaction products with cyclohexane-1,2-dicarboxylic anhydride and propylidenetrimethanol.

The vapour pressure of the test item at 20 °C (293 K) was <1.3x10-8 Pa or <1.0x10-10 mmHg.

The vapour pressure of the test item at 25 °C (293 K) was <3.9x10-8 Pa or <3.0x10-10 mmHg.

Conclusions:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Epoxypropyl neodecanoate, oligomeric reaction products with cyclohexane-1,2-dicarboxylic anhydride and propylidenetrimethanol. The vapour pressure of the test item at 20 °C (293 K) was determined to be <1.3x10-8 Pa and at 25 °C (293 K) was <3.9x10-8 Pa.
Executive summary:

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Epoxypropyl neodecanoate, oligomeric reaction products with cyclohexane-1,2-dicarboxylic anhydride and propylidenetrimethanol, accoding to OECD 104 & EC A.4. The vapour pressure of the test item at 20 °C (293 K) was determined to be <1.3x10-8 Pa and at 25 °C (293 K) was <3.9x10-8 Pa.

Description of key information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Epoxypropyl neodecanoate, oligomeric reaction products with cyclohexane-1,2-dicarboxylic anhydride and propylidenetrimethanol in a study run to EC A.4 and OECD 104. The vapour pressure of the test item at 20 °C (293 K) was determined to be <1.3x10-8 Pa and at 25 °C (293 K) was <3.9x10-8 Pa.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information