2-丁炔-1,4-二醇，简称1,4-丁炔二醇或丁炔二醇。

白色斜方结晶。可溶于水、酸、乙醇和丙酮，不溶于苯、乙醚。对眼部粘膜、皮肤和上呼吸道有刺激作用。

1,4-Butynediol is an organic compound that is an alkyne and a diol. It is a colourless, hygroscopic solid that is soluble in water and polar organic solvents. It is a commercially significant compound in its own right and as a precursor to other products.