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EC number: 607-033-5 | CAS number: 223749-05-1
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2019-09-25 - 2019-10-24 (experimental phase)
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- under GLP
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- OECD Guidelines for the Testing of Chemicals, Method No. 104, adopted 23. Mar. 2006: “Vapour Pressure“
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Commission Regulation (EC) No 761/2009 of 23. July 2009, published on 24. Aug. 2009 Method A.4: “Vapour Pressure”
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
Test material
- Reference substance name:
- Yucca schidigera, ext.
- EC Number:
- 607-033-5
- Cas Number:
- 223749-05-1
- IUPAC Name:
- Yucca schidigera, ext.
- Test material form:
- solid: particulate/powder
- Remarks:
- fine beige
- Details on test material:
- Storage: Room Temperature (20 ± 5 °C)
Homogeneity: homogeneous
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: using a molecular mass of 180.16 g/mol
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: using a molecular mass of 180.16 g/mol
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: using a molecular mass of 1079 g/mol
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: using a molecular mass of 1079 g/mol
Any other information on results incl. tables
See below
Applicant's summary and conclusion
- Conclusions:
- The study was performed according to OECD TG 104 without deviations under GLP and therefore, the results can be considered as reliable. The substance is an UVCB, so only extremes in weight distribution were used for calculation. With vapour pressures ranging from 1.01 * 10-04Pa to 2.48 * 10-04Pa at 25°C, the subtsnace does not need to be regarded as volatile.
- Executive summary:
The vapour pressure of Yucca schidigera, ext. was determined under GLP according to OECD 104 resp. EU A.4 using the effusion method (weight loss).
Vapour pressure was examined at five different temperatures. Three temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, log (p) was plotted against 1/T.
For the calculation of the vapour pressure a molecular weight range of 180.16 – 1079.00 g/mol was used.
Table Vapour Pressures (Effusion Method) for the molecular mass of 180.16 g/mol
Experiment
T
Mean p
Stand. Dev. p
RSD p
No.
K
Pa
Pa
%
1*
303.2
2.03E-02
3.45E-02
170.2%
2
318.2
1.58E-03
3.32E-04
21.0%
3
333.2
4.57E-03
1.31E-03
28.8%
4
348.2
1.61E-02
3.52E-03
21.8%
5*
363.2
2.78E-02
2.18E-02
78.3%
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
*not used for calculation as the RSD was above 30%.
The graph log (p) vs. 1/T shows a straight line with a correlation coefficient of - 0.9971.
For the test item Yucca schidigera, ext., the following vapour pressures at 20°C and at 25°C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.52* 10-04 Pa
Vapour pressure at 25 °C: 2.48* 10-04 Pa
Table Vapour Pressures (Effusion Method) for the molecular mass of 1079 g/mol
Experiment
T
Mean p
Stand. Dev. p
RSD p
No.
K
Pa
Pa
%
1*
303.2
8.29E-03
1.41E-02
170.2%
2
318.2
6.47E-04
1.36E-04
21.0%
3
333.2
1.87E-03
5.37E-04
28.8%
4
348.2
6.58E-03
1.44E-03
21.8%
5*
363.2
1.14E-02
8.91E-03
78.3%
In this table, E-0X represents multiplication with 10-x.
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
*not used for calculation as the RSD was above 30%.
The graph log (p) vs. 1/T shows a straight line with a correlation coefficient of - 0.9971.
For the test item Yucca schidigera, ext., the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C: 6.20* 10-05 Pa
Vapour pressure at 25 °C: 1.01* 10-04 Pa
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