Also known as ammonium sulfide, is the earliest nitrogen fertilizer produced and used at home and abroad. It is commonly used as a standard nitrogen fertilizer with a nitrogen content of between 20% and 30%. Ammonium sulfate is a strong acid and weak base salt, and its aqueous solution is acidic. Ammonium sulfate is a nitrogen fertilizer in inorganic fertilizer, acid fertilizer, long-term single use, so that soil acidification and compaction.

Ammonium sulfate is used for the production of fire extinguisher powders, as nutrient for microorganisms or as hardener in the chip board manufacturing industry. Furthermore, ammonium sulfate serves for the production of flame resistant textiles or papers. Ammonium sulfate by BASF always meets highest quality standards.