CF Industries Holdings, Inc. is the manufacturer and distributor of nitrogen fertilizer and other nitrogen products. The Company's nitrogen fertilizer products are ammonia, granular urea, urea ammonium nitrate solution (UAN) and ammonium nitrate (AN). Its other nitrogen products include diesel exhaust fluid (DEF), urea liquor, nitric acid and aqua ammonia, which are sold primarily to its industrial customers, and compound fertilizer products (NPKs). The Company's segments include ammonia, granular urea, UAN, AN and Other. The Company's ammonia segment produces anhydrous ammonia (ammonia), which is the concentrated nitrogen fertilizer product as it contains 82% nitrogen. Its granular urea segment produces granular urea, which contains 46% nitrogen. Its UAN segment produces UAN, which is a liquid fertilizer product with a nitrogen content that typically ranges from 28% to 32%. Its AN segment produces AN. Its Other segment includes DEF, urea liquor, nitric acid and NPKs.