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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Remarks:
with linear regression analysis
Temp.:
25 °C
Vapour pressure:
0 Pa

Run

Log10 [Vp (25°C)]

1

-9.563

2

-8.472

3

-8.679

4

-8.755

5

-8.900

6

-8.537

7

-8.285

Mean

-8.742

Vapour Pressure

1.8 x 10-9 Pa

The test material did not change in appearance under the conditions used in the determination.

Conclusions:
Vapour pressure was determined to be 1.8 x 10^-9 Pa (0.0000000018 Pa) at 25°C using a vapour pressure balance.
Executive summary:

The vapour pressure of the test substance was determined in accordance with the OECD Guideline for Testing of Chemicals 104, using a vapour pressure balance, and was determined to be 1.8 x 10-9 Pa (0.0000000018 Pa) at 25°C.

Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Study period:
May 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
not specified
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
not specified
GLP compliance:
yes
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Temp.:
61 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: corresponds with 0.00000428 mm Hg
Temp.:
80 °C
Vapour pressure:
0.005 Pa
Remarks on result:
other: corresponds with 0.0000357 mm Hg

Calculation of vapour pressure of BPA 2PO at 61 and 80°C based on experimental results obtained during determination of vapour pressure of the solid substance (extrapolated to 20°C and reported as PT,20), for more details see endpoint record 'Vapour pressure_supporting study 2PO.

Temperature 1/T log PT PT PT
[°C] [1/K]   [Pa] [mm Hg]
         
20 3.41E-03 -5.64 2.30E-06 1.73E-08
         
61 2.99E-03 -3.24 5.71E-04 4.28E-06
80 2.83E-03 -2.32 4.76E-03 3.57E-05
 
Conclusions:
Based on results of the isothermal thermogravimetric effusion method, the vapour pressures of liquefied LIN10001:4,4’-Isopropylidenediphenol, propoxylated at 61°C (344K) and 80°C (353 K) were estimated as 5.71 x 10-4 Pa = 4.28 x 10-6 mm Hg and 4.76 x 10-3 Pa = 3.57 x 10-5 mm Hg, respectively.
Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Study period:
23 November 2010-27 January 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Temp.:
20 °C
Vapour pressure:
0 Pa

Extrapolation of the curve to 20°C resulted in a value of -9.60 for the log νT, 20 of the test substance. Fitting this value in the regression curve, a vapour pressure of 2.30 x 10-6 Pa = 1.73 x 10-8 mm Hg was obtained.

Conclusions:
Using the isothermal thermogravimetric effusion method, the vapour pressure of LIN10001:4,4’-Isopropylidenediphenol, propoxylated at 20°C (293K) was 2.30 x 10-6 Pa = 1.73 x 10-8 mm Hg.

The evaporation rate of the test substance was obtained with a temperature program of above the melting temperature of the test substance. According to this, the vapour pressure of the test substance (which was, according to the method, extrapolated to 20°C) could be slightly overestimated.

Executive summary:

The vapour pressure of the test substance was determined in accordance with the OECD Guideline for Testing of Chemicals 104 and the EU Testing Guideline A.4.. The method used was the effusion method, which gave a vapour pressure of 0.0000023 Pa at 20°C.

Description of key information

Two studies were conducted on the substance BPA 2PO. A read-across has been made from the results of testing on this substance to the registered substance. In the key study, conducted according to OECD Testing Guideline 104 using a vapour pressure balance the vapour pressure was determined to be 1.8 x 10 -9 Pa (0.0000000018 Pa) at 25°C. In the supporting study, also conducted according to OECD Testing Guideline 104 and using the effusion method, the vapour pressure of the substance was found to be 2.3 x 10 -6 Pa at 20°C. In further calculations based on the findings of the supporting study the vapour pressure of the substance at 61°C was found to be 5.71 x 10-4 Pa, and at 80°C was found to be 4.76 x 10-3 Pa. The vapour pressure of the substance is considered to be very low to negligible.

Key value for chemical safety assessment

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

Additional information

Two studies were conducted on the substance BPA 2PO. A read-across has been made from the results of testing on this substance to the registered substance. In the key study, conducted according to OECD Testing Guideline 104 using a vapour pressure balance the vapour pressure was determined to be 1.8 x 10-9Pa (0.0000000018 Pa) at 25°C. In the supporting study, also conducted according to OECD Testing Guideline 104 and using the effusion method, the vapour pressure of the substance was found to be 2.3 x 10-6Pa at 20°C. In further calculations based on the findings of the supporting study the vapour pressure of the substance at 61°C was found to be 5.71 x 10-4Pa, and at 80°C was found to be 4.76 x 10-3Pa. The vapour pressure of the substance is considered to be very low to negligible.