Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

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Description of key information

The sublimation point of acetylene is -84.7°C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
-84.7 °C

Additional information

In accordance with column 2 of REACH Annex VII, the boiling point study does not need to be conducted as this substance is a gas. As published data are available they have been included in the dossier. The CRC Handbook (Lide 2008) is peer reviewed and is considered reliable and suitable for use for this endpoint. The second study (WHO 2003) is also a peer reviewed source and reports a value of -85°C (188.15 K) and supports the value reported in the CRC Handbook.

The boiling point is reported as a sublimation point.