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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
A mass-loss Knudsen-effusion method was for vapor pressure determination.
GLP compliance:
not specified
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0.001 Pa

Final Results-


Estimation (calculation) of P[mPa] at 25°C

1/T = 1/25°C = 0.04 = y

y = -280.25x + 6.1331

0.04 = -280.25x + 6.1331

0.04 - 6.1331 = -280.25x

 -6.0931 = -280.25x

0.02174 = x

1.0513 mPa at 25°C

Regression Results-

Temperature (T)

 

 

 

K

°C

1/T [°C]

340.29

67.14

0.01489425

342.24

69.09

0.01447387

344.1

70.95

0.01409443

346.07

72.92

0.01371366

348.2

75.05

0.01332445

350.29

77.14

0.01296344

352.29

79.14

0.01263584

354.2

81.05

0.01233806

356.07

82.92

0.01205982

358.07

84.92

0.01177579

360.21

87.06

0.01148633

362.29

89.14

0.01121831

 

Description of key information

Vapour pressure is 1.0513E-03 Pa (Mass-loss Knudsen-effusion method, published data).

Key value for chemical safety assessment

Vapour pressure:
0.001 Pa
at the temperature of:
25 °C

Additional information