The chemical industry in India contributes approximately 3% to the country's annual GDP, making it the third largest industry in Asia and twelfth largest globally. The organic and inorganic sectors of the Indian chemical industry are rapidly growing. Organic chemicals include petrochemicals used to produce synthetic fibers, rubber, dyes, drugs, pharmaceuticals, and plastics. Inorganic chemicals produced in India include sulfuric acid, nitric acid, alkalis, soda ash, and caustic soda.