'Sun Algaecide "16"' is an algaecide. Its Federal EPA registration number is: 9157-4. It was originally approved by EPA on 21 Nov 1967. Its registration got cancelled on 01 Jul 1987. It has a 'Caution' signal word. It has the following active ingredients: Dodecylbenzyl trimethyl ammonium chloride. It's approved for 1 sites including swimming pool water. It is also approved for 1 pests and pest groups including but not limited to algae.