Pure acetylene is a colorless, highly flammable gas with an agreeable ethereal (ether-like) odor, but the odor of the commercial purity grade is distinctively garlic-like.

• 纯乙炔是无色、极易燃气体，带有令人愉快的醚（象醚一样）的气味，但商用纯级的乙炔的气味明显象大蒜。