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