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Physical & Chemical properties

Vapour pressure

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Description of key information

0.006 Pa at 20 °C (OECD 104/EU A.4, static method) 

Key value for chemical safety assessment

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

Additional information

According to the OECD guideline, the recommended range for the Static method is: 10 up to 105 Pa. However, when using a capacitance manometer, the Static method can be used below 10-1 Pa (according to guideline’s paragraph ‘Apparatus’). This study was performed using a capacitance manometer with a measurement range of 6 x 10-3 Pa – 2 x 105 Pa. The vapour pressures measured for UM-235 at the three test temperatures were all between 1 .4 x 10-2 and 6 Pa.