Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 20th September and 11th October 2005
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Meets the criteria for classification as Reliable without restriction according to Klimisch et al (1997)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report Date:
2006

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: 92/69/EEC A4 (vapour pressure balance method)
GLP compliance:
yes
Type of method:
effusion method: vapour pressure balance

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Results and discussion

Vapour pressure
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other: First vapour pressure

Any other information on results incl. tables

Run 1
 Temp (°C)  Temp (K)  Reciprocal Temp (K-1)  Mass Difference (µg)  Mass Difference (kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.15  0.001948748  1.95  1.950E-09  0.002707100  -2.567495767
 241  514.15  0.001944958  0.41  4.100E-10  0.000569185  -3.244746522
 242  515.15  0.001941182  2.03  2.030E-09  0.002818160  -2.550034341
 243  516.15  0.001937421  0.81  8.100E-10  0.001124488  -2.949045360
 244  517 .15  0.001933675  0.73  7.300E-10  0.001013427  -2.994207519
 245  518.15  0.001929943  0.24  2.400E-10  0.000333181  -3.477319137
 246  519.15  0.001926226  1.95  1.950E-09  0.002707100  -2.567495767
 247  520.15  0.001922522  1.38  1.380E-09  0.001915794  -2.717651292
 248  521 -15  0.001918833  0.81  8.100E-10  0.001124488  -2.949045360
 249  522.15  0.001915158  0.90  9.000E-10  0.001249431  -2.903287869
 250  523.15  0.001911498  0.73  7.300E-10  0.001013427  -2.994207519

 Run 2
 Temp (°C)  Temp (K)  Reciprocal Temp (K-1)  Mass Difference µg  Mass Difference (Kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.15  0.001948748  0.24  2.400E-10  0.000333181  -3.477319137
 241  514.15  0.001944958  0.98  9.800E-10  0.001360491  -2.866304303
 242  515.15  0.001941182  0.41  4.100E-10  0.000569185  -3.244746522
 243  516.15  0.001937421  0.81  8.100E-10  0.001124488  -2.949045360
 244  517.15  0.001933675  -0.41  -4.100E-10  -  -
 245  518.15  0.001929943  0.90  9.000E-10  0.001249431  -2.903287869
 246  519.15  0.001926226  0.16  1.600E-10  0.000222121  -3.653410396
 247  520.15  0.001922522  -0.49  -4.900E-10  -  -
 248  521.15  0.001918833  1.06  1.060E-09  0.001471552  -2.832224513
 249  522.15  0.001915158  0.33  3.300E-10  0.000458125  -3.339016439
 250  523 .15  0.001911498  1.06  1.060E-09  0.001471552  -2.832224513

 Run 3
 Temp (°C)  Temp (K) Reciprocal Temp (K-1)  Mass Difference (µg)  Mass Difference (Kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.15  0.001948748  0.41  4.100E-10  0.000569185  -3.244746522
 241  514.15  0.001944958  0.49  4.900E-10  0.000680246  -3.167334299
 242  515.15  0.001941182  -0.08  -8.00E-11  -  -
 243  516.15  0.001937421  0.08  8.000E-11  0.000111060  -3.954440392
 244  517.15  0.001933675  -0.16  -1.600E-10  -  -
 245  518.15  0.001929943  0.90  9.000E-10  0.001249431  -2.903287869
 246  519.15  0.001926226  -0.16  -1.600E-10  -  -
 247  520.15  0.001922522  -1.55  -1.550E-09  -  -
 248  521.15  0.001918833  0.49  4.900E-10  0.000680246  -3.167334299
 249  522.15  0.001915158  -0.49  -4.900E-10  -  -
 250  523.15  0.001911498  -0.24  -2.400E-10  -  -

 Run 4
 Temp (°C)  Temp (K)  Reciprocal Temp (K-1)  Mass Difference (µg)  Mass Difference (Kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.15  0.001948748  -0.41  -4.100E-10  -  -
 241  514.15  0.001944958  -1.46  -1.460E-09  -  -
 242  515.15  0.001941182  -0.08  -8.000E-11  -  -
 243  516.15  0.001937421  0.49  4.900E-10  0.000680546  -3.167334299
 244  517.15  0.001933675  0.57  5.700E-10  0.000791306  -3.101655523
 245  518.15  0.001929943  0.24  2.400E-10  0.000333181  -3.477319137
 246  519.15  0.001926226  2.93  2.930E-10  0.004067591  -2.390662758
 247  520.15  0.001922522  -0.33  -3.300E-10  -  -
 248  521.15  0.001918833  0.73  7.300E-10  0.001013427  -2.994207519
 249  522.15  0.001915158  0.81  8.100E-10  0.001124488  -2.949045360
 250  523.15  0.001911498  0.24  2.400E-10  0.000333181  -3.477319137

Run 5
 Temp (°C)  Temp (K)  Reciprocal Temp (K-1)  Mass Difference (µg)  Mass Difference (Kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.5  0.001948748  1.06  1.060E-09  0.001471552  -2.832224513
 241  514.15  0.001944958  0.00  0.000E+00  -  -
 242  515.15  0.001941182  0.16  1.600E-10  0.000222121  -3.653410396
 243  516.15  0.001937421  0.49  4.900E-10  0.000680246  -3.167334299
 244  517.15  0.001933675  0.00  0.000E+00  -  -
 245  518.15  0.001929943  0.00  0.000E+00  -  -
 246  519.15  0.001926226  -0.08  -8.00E-11  -  -
 247  520.15  0.001922522  0.90  9.00E-10  0.001249431  -2.903287869
 248  521.15  0.001918833  -0.73  -7.300E-10  -  -
 249  522.15  0.001915158  -0.24  -2.400E-10  -  -
 250  523.15  0.001911498  -0.65  -6.500E-10  -  -

Run 6
 Temp (°C)  Temp (K)  Reciprocal Temp (K-1)  Mass Difference (µg)  Mass Difference (Kg)  Vapour Pressure (Pa)  Log10 Vp
 240  513.15  0.001948748  -1.79  -1.790E-09  -  -
 241  514 .15  0.001944958  0.33  3.300E-10  0.000458125  -3.339016439
 242  515.15  0.001941182  0.41  4.100E-10  0.000569185  -3.244746522
 243  516.15  0.001937421  0.08  8.00E-11  0.000111060  -3.954440392
 244  517.15  0.001933675  0.16  1.600E-10  0.000222121  -3.653410396
 245  518.15  0.001929943  0.49  4.900E-10  0.000680546  -3.167334299
 246  519.15  0.001926226  -0.73  -7.300E-10  -  -
 247  520.15  0.001922522  0.41  4.100E-10  0.000596185  -3.244746522
 248  521.15  0.001918833  0.73  7.300E-10  0.001013427  -2.994207519
 249  522.15  0.001915158  -1.55  -1.550E-09  -  -
 250  523.15  0.001911498  -1.14  -1.140E-09  -  -

No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapour pressure at 25°C. Run 6 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 248°C (521.15 K) was chosen because this is the data point which gives the highest estimated vapour pressure at any given temperature when a slope of -1500 K is imposed upon it.

The value of -1500 K is an in-house value and is the shallowest slope observed whilst determining the vapour pressure on a wide range of samples using the vapour pressure balance method. Extrapolation to 25°C gave a vapour pressure of 7.129 x 10-6 Pa which has been taken as a maximum for the test material. The test material did not change in appearance under the conditions used in the determination.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test material has been determined to be less than 7.2 x10-6 Pa at 25 "C.
Executive summary:

Introduction:

The Vapour Pressure was measured using EC method 92/69/EEC A4 (vapour pressure balance method)

Results and Conclusions:

The vapour pressure of the test material was determined to be less than 7.2 x 10-6 Pa at 25 °C.