Some explode simply on contact with air. When you read the MSDS, you'll know just how to work with the particular chemical. Use common sense around flammables. Never smoke, cut or weld when you are near them. Don't mix a flammable with another chemical unless instructed to do so.
Static electricity can start fires when flammables are transferred from one container to another.
Use grounding and bonding wires to prevent static. By Themselves Flammables should be stored by themselves, in a temperature-controlled area. It should be well ventilated. Keep flammables far from heat or electric sources. Store flammables in approved safety containers.