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Physical & Chemical properties

Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25 August 2009 – 12 October 2009
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 104 (Vapour Pressure Curve)
according to guideline
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Key result
20 °C
Vapour pressure:
279 - 340 Pa
Remarks on result:
other: Due to the high volatility of the test substance and the behaviour in the equipment, it was not possible to calculate the vapour pressure as an exact value, but rather a range is reported based on the two individual (valid) measurements.
The isothermal thermogravimetric effusion method was chosen for the determination of the vapour pressure of HEXAHYDRO-1,3,5-TRIMETHYL-S-TRIAZINE. The vapour pressure of the test substance at 20°C (293K) was 279-340 Pa (2.09-2.55 mm Hg).
Executive summary:

Vapour pressure of HEXAHYDRO-1,3,5-TRIMETHYL-S-TRIAZINE was determined in accordance with EC Method A.4.. The vapour pressure of the test substance at 20°C (293K) was 279-340 Pa (2.09-2.55 mm Hg) (Baltussen, 2010).

Description of key information

Vapour Pressure = 279 - 340 Pa (2.09 - 2.55 mm Hg), EC A.4, Baltussen (2010)

Key value for chemical safety assessment

Vapour pressure:
340 Pa
at the temperature of:
20 °C

Additional information

A single key study was submitted for this endpoint, conducted in accordance with EC Method A.4. The vapour pressure was determined to be 340 Pa (20 °C) (Baltussen, 2010).