火山爆發時是有sulfur dioxide (SO2)和hydrogen sulfide (H2S) (臭雞蛋的味)所以有硫化物味。hydrogen fluoride是用來在玻璃上刻字的,如實驗室裏量杯上的刻度。所以要遠離火山。
Ninety-nine percent of the gas molecules emitted during a volcanic eruption are water vapor (H2O), carbon dioxide (CO2), and sulfur dioxide (SO2). The remaining one percent is comprised of small amounts of , carbon monoxide, hydrogen chloride, hydrogen fluoride, and other minor gas species.