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EC number: 209-967-5 | CAS number: 599-61-1
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 24 August 2011 - 17 November 2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: This study has been performed according to OECD and EC guidelines and in compliance with GLP principles.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- (2006)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- (2009)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Remarks:
- (isothermal thermogravimetric effusion method)
- Temp.:
- 20 °C
- Vapour pressure:
- < 0.002 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- < 0.004 Pa
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of 3,3’-DDS.
The vapour pressure of the test substance at 20°C (293K) was < 1.5 x 10E-3 Pa (= < 1.1 x 10E-5 mm Hg).
No significant weight loss of the test substance was observed below the melting temperature of the test substance (i.e. a relatively low vapour pressure was obtained). - Executive summary:
The vapour pressure of the 3,3' -DDS at 20°C (293K) was < 1.5 x 10E-3 Pa (= < 1.1 x 10E-5 mm Hg).
Reference
Weight loss curves of the test substance and hexachlorobenzene were compared.
Reference PT value of hexachlorobenzene: 0.00147 Pa (20°C) (corresponds with 0.00421 Pa at 25°C)
The weight loss of the test substance at 110°C, 120°C, 130°C and 140°C was lower than the weight loss of hexachlorobenzene at the same temperatures.
No significant weight loss of the test substance was observed below the melting temperature of the test substance (i.e. a relatively low vapour pressure was obtained).
Description of key information
DETERMINATION OF PHYSICO-CHEMICAL PROPERTIES OF 3,3’-DDS, project 496966, 2011
Dr. Ir. E. Baltussen.
Study performed according to OECD and EC guidelines and in compliance with GLP principles.
Key value for chemical safety assessment
- Vapour pressure:
- 0.002 Pa
- at the temperature of:
- 20 °C
Additional information
The isothermal TGA effusion method was applied for the determination of the vapour pressure of 3,3’-DDS.
The vapour pressure of the test substance at 20°C (293K) was < 1.5 x 10^-3 Pa (= < 1.1 x 10^-5 mm Hg).
No significant weight loss of the test substance was observed below the melting temperature of the test substance (i.e. a relatively low vapour pressure was obtained).
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