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EC number: 224-338-5 | CAS number: 4316-73-8
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Remarks:
- acceptable study, meets basic scientific principles
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 991
- Report date:
- 1991
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- no
- Type of method:
- dynamic method
- Remarks:
- with argon
Test material
- Reference substance name:
- Sodium sarcosinate
- EC Number:
- 224-338-5
- EC Name:
- Sodium sarcosinate
- Cas Number:
- 4316-73-8
- Molecular formula:
- C3H6NNaO2
- IUPAC Name:
- sodium (methylamino)acetate
- Test material form:
- liquid
- Details on test material:
- Name of test material (as cited in study report):N-methylglycine sodium salt (35 - 40%) in water ("Sodium Sarcosinate Sol.")
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 12.62 hPa
- Remarks on result:
- other: calculated from the regression equation
- Temp.:
- 30 °C
- Vapour pressure:
- 23.61 hPa
- Temp.:
- 40 °C
- Vapour pressure:
- 42.1 hPa
- Temp.:
- 50 °C
- Vapour pressure:
- 71.99 hPa
Vapour pressure at 50°C (if relevant for classification of gas under pressure)
- Key result
- Vapour pressure:
- 71.99 hPa
Any other information on results incl. tables
Temperature [°C] |
Vapour Pressure [hPa] |
Abberation [%] |
|
|
Measurement |
Calculation |
|
27.7 |
20.00 |
20.53 |
-2.58 |
33.7 |
30.00 |
29.39 |
2.06 |
42.8 |
50.00 |
49.12 |
1.79 |
49.2 |
70.00 |
69.07 |
1.35 |
56.2 |
100.0 |
98.49 |
1.53 |
72.3 |
200.0 |
209.1 |
-4.33 |
80.7 |
300.0 |
300.0 |
0.00 |
94.1 |
500.0 |
513.2 |
-2.56 |
102.1 |
700.0 |
692.3 |
1.11 |
111.9 |
1000.0 |
979.9 |
2.05 |
112.87 |
--- |
1013.25 |
--- |
The regression of the results leads with a mean deviation of 1.94%to
the following equation:
In(p/hPa) = 11.5590 – 3895.50/ (224.52 +T/°C)
The vapour pressure at 20 °C was calculated from the regression equation.
The normal boiling temperature was obtained by intrapolation/extrapolation from the vapour pressure curve.
Applicant's summary and conclusion
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