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EC number: 273-179-8 | CAS number: 68952-95-4 A complex combination of fatty acids, neutral vegetable-oil, proteins, and other minor components produced by boiling vegetable-oil soapstock with mineral acid and, optionally, further separating the oil phase acidulated soapstock from the aqueous phase.
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- supporting study
- Study period:
- From July 14, 2010 to July 15, 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- KL2 due to RA
- Justification for type of information:
- Refer to the section 13 for details on the read across justification. The vapour pressure study with the read across substance is used as a supporting study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.001 Pa
- Conclusions:
- Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.00113 Pa at 20°C.
- Executive summary:
A study was conducted to determine the vapour pressure of the read-across substance ‘glycerides, C16-18 and C18-unsatd., deodorizer distillates' according to the OECD Guideline 104 and EU method A.4. Approximately 22.6 or 27.1 mg of the read across substance was applied to the surface of a roughened glass plate as a homogeneous layer. The plate was dried under nitrogen in the thermogravimetric analyzer (TGA). The weight loss of the read across substance was measured continuously as a function of time. Benzo(ghi)perylene, chrysene, hexachlorobenzene, naphthalene and water were used as reference substances for validation. The log Vt, 20 value which was obtained by extrapolation of the evaporation rate curve, fitted in the vapour pressure regression curve. Under the study conditions, the vapour pressure of the substance was found to be 0.00113 Pa at 20°C (Brekelmans, 2010c). Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.00113 Pa at 20°C.
- Endpoint:
- vapour pressure
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- supporting study
- Study period:
- From July 26, 2010 to July 27, 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- KL2 due to RA
- Justification for type of information:
- Refer to the section 13 for details on the read across justification. The vapour pressure study with the read across substance is used as a supporting study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.152 Pa
- Remarks on result:
- other: None
- Conclusions:
- Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.152 Pa at 20°C.
- Executive summary:
A study was conducted to determine the vapour pressure of the read-across substance ‘lauric fats deodorizer distillates ' according to the OECD Guideline 104 and EU method A.4. Approximately 15.2 or 17.5 mg of the read across substance was applied to the surface of a roughened glass plate as a homogeneous layer. The plate was dried under nitrogen in the thermogravimetric analyzer (TGA). The weight loss of the read across substance was measured continuously as a function of time. Benzo(ghi)perylene, chrysene, hexachlorobenzene, naphthalene and water were used as reference substances for validation. The log Vt, 20 value which was obtained by extrapolation of the evaporation rate curve, fitted in the vapour pressure regression curve. Under the study conditions, the vapour pressure of the substance was determined to be 0.152 Pa at 20°C (Brekelmans, 2010d). Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.152 Pa at 20°C.
- Endpoint:
- vapour pressure
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Study period:
- April 23, 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- KL2 due to RA
- Justification for type of information:
- Refer to the section 13 for details on the read across justification. The vapor pressure study with the read across substance is used as a supporting study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.033 Pa
- Conclusions:
- Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.0328 Pa at 20°C.
- Executive summary:
A study was conducted to determine the vapour pressure of the read across substance according to OECD Guideline 104 and EU method A.4. 17.5 and 17.9 mg of the read across substance was applied on glass plates respectively, and placed in the thermogravimetric analyzer. The weight loss of the read across substance was measured continuously as a function of time from 70°C to 150°C. Benzo(ghi)perylene, chrysene, hexachlorobenzene, naphthalene and water were used as reference substances for validation. The log Vt, 20 value which was obtained by extrapolation of the evaporation rate curve, fitted in the vapour pressure regression curve. From this, it was concluded that the vapour pressure of the read across substance at 20°C is 3.28 × 10-2 Pa = 2.46 × 10-4 mm Hg. Under the study conditions, the vapour pressure of the read across substance was determined to be 0.0328 Pa at 20°C (Brekelmans, 2010a). Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.0328 Pa at 20°C.
- Endpoint:
- vapour pressure
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- supporting study
- Study period:
- From April 23 to April 26, 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- KL2 due to RA
- Justification for type of information:
- Refer to the section 13 for details on the read across justification. The vapor pressure study with the read across substance is used as a supporting study.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.003 Pa
- Conclusions:
- Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.00312 Pa at 20°C.
- Executive summary:
A study was conducted to determine the vapour pressure of the read-across substance 'soybean oil, deodorizer distillates' according to OECD Guideline 104 and EU method A.4. Approximately 18.1 or 24.4 mg of the read across substance was applied to the surface of a roughened glass plate as a homogeneous layer. The plates were dried under nitrogen in the thermogravimetric analyzer (TGA). The weight loss of the read across substance was measured continuously as a function of time. Benzo(ghi)perylene, chrysene, hexachlorobenzene, naphthalene and water were used as reference substances for validation. The log Vt, 20 value which was obtained by extrapolation of the evaporation rate curve, fitted in the vapour pressure regression curve. Under the study conditions, the vapour pressure of the substance was determined to be 0.00312 Pa at 20°C (Brekelmans, 2010b). Based on the results of the read across study, the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated is considered to be 0.00312 Pa at 20°C.
Referenceopen allclose all
Table 1. Results of the isothermal TGA analysis
Temperature (deg. C) |
Weight loss (µg/min) |
VT (g/cm2/h) |
Log VT |
120 |
7.470 6.161 |
8.92x 10-4 7.35 x 10-4 |
-3. 05 -3.13 |
130 |
12.63 11.72 |
1.51x 10-3 1.40 x 10-3 |
-2.82 -2.85 |
140 |
23.88 22.77 |
2.85 x 10-3 2.72 x 10-3 |
-2.55 -2.57 |
150 |
44.87 42.33 |
5.36 x 10-3 5.05 x 10-3 |
-2.27 -2.30 |
Table 1. Results of the isothermal TGA analysis
Temperature (deg. C) |
Weight loss (µg/min) |
VT (g/cm2/h) |
Log VT |
80 |
6.583 7.170 |
7.86x 10-4 8.56 x 10-4 |
-3.10 -3.07 |
90 |
13.54 15.48 |
1.62x 10-3 1.85 x 10-3 |
-2.79 -2.73 |
100 |
23.73 24.25 |
2.83 x 10-3 2.89 x 10-3 |
-2.55 -2.54 |
110 |
37.05 37.11 |
4.42 x 10-3 4.43 x 10-3 |
-2.35 -2.35 |
The logarithm of the evaporation rate of the reference control substance at 20°C deviated < 10% from the average value obtained during the validation test. This show the acceptability of the data of the reference substances for the determination of the vapour pressure of the test substance.
The equation of reference regression curve was found to be log P20= 1.04 X log V20+ 4.32 (r =0.993, n=10).
Extrapolation of the curve to 20°C resulted in a value of -5.60 for the log νT, 20 of the test substance and the value was fitting in the regression curve.
The plot of log VT of the test substance versus 1000/T figure 1 (in the window 'attached background material').
The results of the isothermal TGA analysis are given in table 1 below.
Table 1 Results of the isothermal TGA analysis
Temperature (deg. C) |
Weight loss (µg/min) |
VT(g/cm2/h) |
Log VT |
110 |
10.58 10.10 |
1.26 x 10-3 1.21 x 10-3 |
-2.90 -2.92 |
120 |
17.17 17.23 |
2.05 x 10-3 2.06 x 10-3 |
-2.69 -2.69 |
130 |
27.27 28.25 |
3.31 x 10-3 3.37 x 10-3 |
-2.48 -2.47 |
140 |
44.22 45.17 |
5.28 x 10-3 5.39 x 10-3 |
-2.28 -2.27 |
Table 1. Results of the isothermal TGA analysis
Temperature (deg. C) |
Weight loss (µg/min) |
VT (g/cm2/h) |
Log VT |
120 |
3.417 3.216 |
4.08 x 10-4 3.84 x 10-4 |
-3.39 -3.42 |
130 |
5.570 5.666 |
6.65x 10-4 6.77x 10-4 |
-3.18 -3.17 |
140 |
9.355 9.383 |
1.12 x 10-3 1.12 x 10-3 |
-2.95 -2.95 |
Description of key information
A study was conducted to determine the vapour pressure of the test substance, Soaps, stocks, vegetable oil, acidulated according to the OECD Guideline 104 and EU Method A.4.
Key value for chemical safety assessment
- Vapour pressure:
- 0.001 Pa
- at the temperature of:
- 20 °C
Additional information
Measured vapoure pressure range was 0.00113 Pa to 0.152 Pa
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
