The safety of air travel depends on the carriage of certain items and goods on board the aircraft. These items are generally referred to as hazardous materials.
Hazardous materials may be objects of everyday use: dry ice, sprays and perfume, bleach, batteries, adhesives and many other items that do not pose any threat when used in other circumstances.
- Some items may unintentionally, e.g. by friction or heat generation, cause fire in the passenger's baggage (safety matches, lighter, diving torch);
- Due to oxidation, some substances (like bleach) can stimulate the combustion of other materials.
In case of doubt whether a given item can be hazardous in air transport, please contact your airline or consult its air carriage rules.