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EC number: 260-135-8 | CAS number: 56375-79-2
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:
- 18 June 2015 - 27 November 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- (2009)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- (2006)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- (1996)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- < 7 other: E-03 Pa
- Remarks on result:
- other: (<5.3E-05 mm Hg)
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- < 1.5 other: E-03 Pa
- Remarks on result:
- other: (<1.1E-05 mm Hg)
- Conclusions:
- Using the isothermal thermogravimetric effusion method, the vapour pressure of MTBAC at 25°C has been determined as < 7.0E-03 Pa. The vapour pressure of MTBAC at 20°C has been determined as < 1.5E-03 Pa.
The study was performed in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950 guidelines and in compliance with GLP.
Reference
In both the first and second analysis of the test substance, the weight losses of the test substance at 110°C, 120°C, 130°C and 140°C were lower than the weight losses of hexachlorobenzene at the same temperatures. From this it was concluded that vapour pressure of the substance at 20°C (25°C) is lower than the vapour pressure of hexachlorobenzene at 20°C (25°C).
Description of key information
Using the isothermal thermogravimetric effusion method, the vapour pressure of MTBAC at 25°C has been determined as < 7.0E-03 Pa. The vapour pressure of MTBAC at 20°C has been determined as < 1.5E-03 Pa. The study was performed in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950 guidelines and in compliance with GLP.
Key value for chemical safety assessment
- Vapour pressure:
- 0.007 Pa
- at the temperature of:
- 25 °C
Additional information
Key value for CSA: < 0.007 Pa at 25°C
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