The boundaries of the chemical industry, then, are somewhat confused. Its main raw materials 
are the fossil fuels (coal, gas, and petroleum), atmosphere, water, salt, limestone, sulfur or an equivalent, and some specialized raw materials for special items, such as phosphates and the mineral fluorspar.
The chemical industry comprises the firms that produce commercial chemicals. Central to the modern world economy, it converts raw materials (oil, natural gas, air, water, Air Compressor For Production Of Chemical Raw Materials china metals, and nutrients) into more than 70,000 different products.