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Physical & Chemical properties

Boiling point

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Description of key information

The boiling point of 2-butyne-1,4-diol at 101.3 kPa is 238 degrees C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
238 °C

Additional information

Weight of evidence from several authoritative secondary sources indicates that the boiling point of 1,4 -butynediol at 101.3 kPa ranges from 209.89 (estimated by calculation, ISP 2010) to 248 °C at 101.3 kPa.

2-Butyne-1,4-diol decomposes relatively slowly between 160 and 200 ◦C, but at temperatures significantly above 200 ◦C violent decomposition can occur. Explosive decomposition can be caused or accelerated by alkali hydroxide, strong anhydrous acids, and

certain heavy-metal salts, particularly those of mercury (Gräfje, et. al. 2000).