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Physical & Chemical properties

Melting point / freezing point

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Description of key information

-116.3 °C (Merck)

-116.3 °C (156.8 K, e.s.d. = 0.3 K, literature average (n = 8), NIST Chemistry Webbook)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
156.8 K

Additional information

The survey of published literature data carried out by NIST contains melting points for two crystal forms (m.p. = 150.0 K and 156.8 K). The recalculated average for the non-metastable form is in good agreement with the available handbook data. The available data is considered to be adequate and complete for use in classification and labelling as well as risk assessment purposes.