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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006-06-22 to 2006-09-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same 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
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2005-06-09
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0 Pa

The full results of the two runs are presented in following tables

Determination of the vapour pressure of DIGIRENA SA TEMABF4 anhydrous (Run 1)

Temperature (°C)

Mass difference (μg)

Vapour pressure (Pa)

1/Temperature (1/K)

Log vapour pressure

120.0 0.14 0.00023 0.00254 -3.64
125.0 0.15 0.00025 0.00251 -3.61
130.0 0.18 0.00030 0.00248 -3.53
136.0 0.22 0.00036 0.00244 -3.44
141.5 0.24 0.00039 0.00241 -3.40
146.5 0.27 0.00044 0.00238 -3.35
152.0 0.37 0.00061 0.00235 -3.22
157.0 0.48 0.00079 0.00232 -3.10
162.0 0.66 0.00108 0.00230 -2.96
166.5 0.76 0.00125 0.00227 -2.90
172.0 1.18 0.00194 0.00225 -2.71
177.0 1.82 0.00301 0.00222 -2.52
182.5 2.53

0.00417

0.00219

-2.38

Determination of the vapour pressure of DIGIRENA SA TEMABF4 anhydrous (Run 2)

Temperature (°C)

Mass difference (μg)

Vapour pressure (Pa)

1/Temperature (1/K)

Log vapour pressure

128.0

0.10

0.00016

0.00249

-3.78

132.5

0.13

0.00021

0.00247

-3.67

138.0

0.14

0.00023

0.00243

-3.64

143.5

0.18

0.00030

0.00240

-3.53

 149.0

0.18

0.00030

0.00237

-3.53

154.5

0.22

0.00036

0.00234

-3.44

159.0

0.31

0.00051

0.00231

-3.29

164.0

0.44

0.00072

0.00229

-3.14

169.5

0.82

0.00135

0.00226

-2.87

174.5

1.07

0.00176

0.00223

-2.75

180.0

1.67

0.00276

0.00221

-2.56

185.0

2.51

0.00414

0.00218

-2.38

Run 1

Run 2

Correlation

-0.9692

-0.9618

Slope

-3554

-4418

Intercept

5.253

7.085

Vp (Pa) at 25 °C

2.2 x 10-7

1.9 x 10-8

The runs gave a mean vapour pressure value at 25 °C of 1 x 10-7 Pa.

Conclusions:
The vapour pressure of DIGIRENA SA TEMABF4 anhydrous was determined to be 1 x 10^-7 Pa at 25 °C.

Description of key information

The vapour pressure of DIGIRENA SA TEMABF4 anhydrous was determined to be 1 x 10^-7 Pa at 25 °C.

Key value for chemical safety assessment

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

Additional information