What is the ruling on using inhalers that contain intoxicating substances such as propane and butane, and are these substances considered impure when they come into contact with the body or other objects?

The answer can be summarized in the following points:

Butane and propane are colorless, highly flammable gases used as fuel, while propanol and isopropanol are alcohols used in various industries and cosmetics. If it is proven that deodorants or perfumes containing alcohol intoxicate when a large quantity is consumed or inhaled, then they are considered intoxicants (khamr) and must be avoided, and their sale and use are prohibited. The criterion is not whether the gas or alcohol itself is an intoxicant or anesthetic, but rather the entire mixture (perfume with gas and other ingredients) and whether it causes intoxication or anesthesia. If the intoxicating or anesthetic effect of the gas or alcohol disappears when mixed, or if its added proportion is small, then the mixture is not considered an intoxicant (khamr), and its use is permissible. A deodorant or perfume cannot be judged as an intoxicant (khamr) unless it is proven to cause intoxication when consumed or inhaled in large quantities, because the ruling applies to the entire mixture.