[{"from": "human", "value": "Provide a description of this molecule. [C][#C][C][Br]"}, {"from": "gpt", "value": "The molecule appears as a colorless to light yellow liquid substance with a sharp odor. Flash point 65 \u00b0F. Denser than water and insoluble in water. Vapors are heavier than air. May be irritating to skin and eyes. Used to make other chemicals. It may decompose explosively with mild shock."}]