Why perfume catches fire?

You must have read the warning sign on your antiperspirants/deodorant bottles, which reads, keep away from fire. Beauty products contain highly flammable chemicals. Hair mousse, hair spray, perfumes and deodorants are some examples. If left on a sunny window, these items can explode. That is why it is recommended to keep them out of the sun.

Credit:https://timesofindia.indiatimes.com/