Noun
ammonium sulfate (uncountable)
English Wikipedia has an article on:ammonium sulfateWikipedia
(US, inorganic chemistry) An inorganic chemical compound, (NH4)2SO4, commonly used as a fertilizer and as a food additive (E517) used as an improving agent.
For remediation of gaseous emissions Ammonia is used to scrub SO 2 from the burning of fossil fuels, and the resulting product is converted to ammonium sulfate for use as fertilizer. Source: Internet
To separate berkelium from the unreacted americium, this solution was added to a mixture of ammonium and ammonium sulfate and heated to convert all the dissolved americium into the oxidation state +6. Source: Internet