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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Vapour pressure

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Description of key information

0.279 Pa at 20 °C, 0.631 Pa at 25 °C, OECD Guideline 104, and Method A.4 (EC) No 440/2008.

Key value for chemical safety assessment

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

Additional information

Stull (1947) reported a series of measured vapour pressure values from the literature (1895) in the temperature range between 134 °C and 262 °C. The original text is not available, so as the method description. The document is not considered reliable.

A recent guideline study was conducted by Halarnakar according to OECD Guideline 104, and Method A.4 (EC) No 440/2008. In accordance with Regulation (EC) No. 1907/2006, Article 13(3), the vapour pressure value 0.631 at 25 °C is carried forward for the purpose of risk assessment, classification and labelling.