Chemical engineering is a branch of engineering that applies physical sciences and life sciences together with mathematics and economics to produce, transform, transport, and properly use chemicals, materials and energy to manufacture products through chemical processes. Chemical Engineers convert raw materials into most usable forms. Chemical engineers may work at a petroleum refinery to turn crude oil into gasoline, jet fuel, diesel fuel etc; at a fertilizer plant to produce ammonium nitrate, or at a personal-care product manufacturer to mix ingredients to produce a particular product like shampoo or skin Care lotion. Chemical engineering involves managing plant processes and conditions to ensure perfect plant operation. Chemical engineers use chemistry and engineering knowledge to turn raw materials into ready to use products, such as medicine, petrochemicals and plastics on a large-scale, industrial setting.