CF Industries Holdings, Inc. manufactures and distributes 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 the Company's industrial customers, and compound fertilizer products (nitrogen, phosphorus and potassium or NPKs). The Company's segments include ammonia, granular urea, UAN, AN and other. The Company's ammonia segment produces anhydrous ammonia (ammonia), which is concentrated nitrogen fertilizer as it contains 82% nitrogen. The granular urea segment produces granular urea, which contains 46% nitrogen. The UAN segment produces urea ammonium nitrate solution. The Other segment includes DEF, urea liquor, nitric acid and NPKs. The Company's primary nitrogen fertilizer products are ammonia, granular urea, UAN and AN.