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Physical & Chemical properties

Vapour pressure

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Description of key information

Performance of a test that measures the vapour pressure of lithium metal is scientifically unjustified and dangerous as lithium is known to violently react with water and therefore classified and labelled as water react. 1 (category 1), H260. The reaction yields lithium hydroxide and flammable hydrogen gas.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure of lithium was estimated using MPBPWIN v1.43 embedded in EPI Suite v4.10 of EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC). The program is a screening level tool and estimates the vapour pressure of chemicals using three sperate methods. The modified Grain method was chosen as it may be the best allround vapour pressure estimation method currently available. A vapour pressure of 3.49E-029 Pa was derived for lithium. As the test item is an inorganic metal the program states that no inorganic compounds were included in the training data set for the utilized methodology and therefore inorganic compounds are outside the estimation domain. As lithium quickly dissociates in water forming lithium hydroxide and hydrogen gas this EPI Suite estimation is adequate enough to be used for the risk assessment.

The minimum value possible for the chemical safety assessment with EasyTRA is 1.00E-06. Therefore this value was inserted as key value.