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Physical & Chemical properties

Vapour pressure

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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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990
Report date:
1990

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

Test material

Reference
Name:
Unnamed
Test material form:
liquid
Specific details on test material used for the study:
Test material: 1,1-Diethoxyethan
Purity: 99.8 % (given by sponsor)

Results and discussion

Vapour pressureopen allclose all
Key result
Temp.:
20 °C
Vapour pressure:
36.37 hPa
Remarks on result:
other: calculated from the regression equation
Key result
Temp.:
25 °C
Vapour pressure:
47.06 hPa
Remarks on result:
other: calculated from the regression equation
Key result
Temp.:
50 °C
Vapour pressure:
149.69 hPa
Remarks on result:
other: calculated from the regression equation
Vapour pressure at 50°C (if relevant for classification of gas under pressure)
Key result
Vapour pressure:
149.69 hPa
Remarks on result:
other: calculated from the regression equation

Any other information on results incl. tables

Results:

 Temperature [°C]

 Vapour Pressure [hPa]

(measurement)

 Vapour Pressure [hPa]

(calculation)

 Aberration [%
 26.28 50.00  50.19  -0.38 
 33.08 70.00  69.98  0.03 
 40.76 100.0  99.93  0.07 
 57.10 200.0  200.8  -0,39 
 67.12 300.0  297.0 0.99
 81.45 500.0  498.8  0.24 
 91.71 700.0 703.6  -0.51 
 103.64 1045  1023  2.13 
 130.01 2099  2151  -2.43 
 143.17 2942  3001  -1.98 
 153.65 3855  3852  0.08 
 164.32 5012  4901  2.26 
 181.00 6938  6971  -0.48 
 199.20 9964  9935  0.29 
 103.32 1013.25  - 

The regression of the results leads with a mean deviation of 0.88 % to the following equation:

ln(p/hPa) = 10.5800 - 3676.50 / (244.61 + t/°C)

The vapour pressure at 20 °C, 25 °C and 50°C was calculated from the regression equation.

The normal boiling temperature was obtained by intrapolation from the vapour pressure curve.

Applicant's summary and conclusion