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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:
20 November 2017 - 17. January 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Guideline study as required by REACH regulation 1907/2006
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
OECD Guidelines for the Testing of Chemicals, Method No. 104, adopted 23. Mar. 2006: “Vapour Pressure“
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Commission Regulation (EC) No 761/2009 of 23. July 2009, published on 24. Aug. 2009 Method A.4: “Vapour Pressure”
Deviations:
no
Qualifier:
according to
Guideline:
other: E.D.Cater, Ch.2A, Physicochemical Measurements in Metal Research, Part 1, R.A. Rapp, Ed., John Wiley, New York, 1970
Version / remarks:
1970; Source of correction constants
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 06386
- Expiration date of the lot/batch:June 2020
- Purity test date: July 2017
Temp.:
60 °C
Vapour pressure:
0.04 Pa
Remarks on result:
other: Calculated value at 60°C: Limit value for molecular mass of 580.06 g/mol
Remarks:
For the calculation of the vapour pressure a molecular mass of 580.06 – 660.04 g/mol was used.
Temp.:
60 °C
Vapour pressure:
0.038 Pa
Remarks on result:
other: Calculated value at 60°C: Limit value for molecular mass of 660.04 g/mol
Remarks:
For the calculation of the vapour pressure a molecular mass of 580.06 – 660.04 g/mol was used.
Key result
Temp.:
60 °C
Vapour pressure:
>= 0.038 - <= 0.04 Pa
Remarks on result:
other: calculated mean

Vapourpressure was examined at nine different temperatures. No temperatures could be evaluated as they showed no reproducible weight loss.

 As a calculation on base of the measured weight losses is not possible, the highest vapour pressure of the test item derived from all measurements, was stated as limit value.
Limit Value for the molecular mass of 580.06 g/mol: Vapour pressure at 60 °C:        4.03* 10-02Pa

Limit Value for the molecular mass of 660.04 g/mol: Vapour pressure at 60 °C:        3.78* 10-02Pa

Note: For the calculation of the vapour pressure a molecular mass of 580.06 – 660.04 g/mol was used.                   


Conclusions:
Limit Value for the molecular mass of 580.06 g/mol:
Vapour pressure at 60 °C: 4.03 * 10-02Pa
Limit Value for the molecular mass of 660.04 g/mol:
Vapour pressure at 60 °C: 3.78 * 10-02Pa
Calculated mean: 0,03905 Pa at 60°C
Executive summary:

The vapour pressure of the test item was determined at nine different temperatures (30, 45, 60, 75, 90, 105, 120, 135 and 150 °C) according to OECD 104 resp. EU A.4 using the effusion method (weight loss). All experiments 1 – 9 (nominal temperature 30 - 150 °C) showed no reproducible weight loss. When visible contaminations, caused by explosive evaporation of the test item, were observed, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, these measurements were not used for calculations.

As a calculation on base of the measured weight losses is not possible, the highest vapour pressure of the test item70% w/w Phytic acid (made from dermofeel PA)derived from all measurements, was stated as limit value.

For the calculation of the vapour pressure a molecular mass of 580.06 – 660.04 g/mol was used. 

Limit Value for the molecular mass of 580.06 g/mol: Vapour pressure at 60 °C:        4.03* 10-02Pa

Limit Value for the molecular mass of 660.04 g/mol: Vapour pressure at 60 °C:        3.78* 10-02Pa

 

       

Description of key information

Limit value for vapour pressure at 60°C according to OECD 104 resp.EU A.4 using the effusion method (weight loss).

Key value for chemical safety assessment

Vapour pressure:
0.039 Pa
at the temperature of:
60 °C

Additional information

Vapourpressure was examined at nine different temperatures. No temperatures could be evaluated as they showed no reproducible weight loss.

As a calculation on base of the measured weight losses is not possible, the highest vapour pressure of the test item,derived from all measurements, was stated as limit value.

Limit Value for the molecular mass of 580.06 g/mol:

Vapour pressure at 60 °C:       4.03 * 10-02Pa

Limit Value for the molecular mass of 660.04 g/mol:

Vapour pressure at 60 °C:       3.78 * 10-02Pa

The resulting key value of 3.905 * 10 -02Pa at 60°C is a calculated mean.