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Vapour pressure

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Description of key information

According to ECHA's endpoint specific guidance R.7a (2013), vapour pressure testing is not required for a substance with a standard boiling point of < 30 ºC, as this substance will have a vapour pressure above the limit of measurement (i.e. 10E+05 Pa). The boiling point of ozone is –111.35 °C, hence no testing required. Ozone is a gas at the temperature of use. Nevertheless, a key value for chemical safety assessment is adopted from the online source PubChem, reporting a vapour pressure of 41257 mm Hg at 10.4 °C, which is equivalent to 55005 Pa at –12 °C.

Key value for chemical safety assessment

Vapour pressure:
55 000 Pa
at the temperature of:
-12 °C

Additional information