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EC number: 202-905-8 | CAS number: 100-97-0
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:
- 1957
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: only data from published literature available
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- measurements were carried out under high vacuum in a temperature range of 20-85 °C using a quartz filament manometer
- GLP compliance:
- not specified
- Type of method:
- other: heating under high vacuum
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.001 mm Hg
- Remarks on result:
- other: start point of vapour pressure measurement
- Temp.:
- 85 °C
- Vapour pressure:
- 0.1 mm Hg
- Remarks on result:
- other: endpoint of vapour-pressure measurement
- Key result
- Transition / decomposition:
- yes
- Remarks:
- decomposition
- Transition temp.:
- >= 195 - <= 405 °C
- Conclusions:
- At 20°C and at 85°C, vapour pressures of 0.001 and 0.1 mm Hg (0.13 and 13 Pa) were measured.
- Executive summary:
Vapour pressures of methenamine at a temperature-range of 20-85 °C under high vacuum were determined. At 20°C and at 85°C, vapour pressures of 0.001 and 0.1 mm Hg (0.13 and 13 Pa) were measured. At a temperature-range from 195 -405 °C decomposition was observed.
Reference
values on vapour-pressure are recorded referring to a temperature-range of 20 -85 °C
Description of key information
Several values for the vapour pressure of methenamine were determined at a temperature-range of 20-85 °C under high vacuum. At 20°C and at 85°C,vapourpressures of 0.001 and 0.1 mm Hg (0.13 and 13 Pa) were measured.
Key value for chemical safety assessment
- Vapour pressure:
- 0.13 Pa
- at the temperature of:
- 293.15 K
Additional information
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