Chemicals are known forms of matter that have properties that consist of constant characteristic properties and chemical compositions. It's impossible to separate chemical substances into components without having the chemical bonds broken. This is typically done using physical separation methods. Chemicals can be found in various states, including plasma, solid, gas and liquid, and are able to change between these states when temperatures and pressures change. There are various industries that chemicals are a commodity to including life sciences, materials, agricultural, defense, energy, industrial, pharmaceuticals, some product manufacturers and defense.