Steve Allen talks in depth to celebrities about their lives.
18 July 2017, 14:52
Why did we stop using smelling salts to revive people who had fainted? And what are they made of? A scientist was on hand to answer.
What are smelling salts made of, and are they still used today?
Name: Tony, Kingsbury
Answer: They are made of ammonium carbonate which sublimates (turns from a solid to a gas without going through the liquid stage) to release ammonia. You can still buy it from places such as Holland and Barrett.