U.S. EPA registered pesticide info
'Chek Bac 40% Concentrate Algicide For Swimming Pools' is an algaecide. Its Federal EPA registration number is: 1289-18. It was originally approved by EPA on 05 May 1965. Its registration got cancelled on 01 Jul 1987. It has a 'Danger' signal word. It has the following active ingredients: Methyldodecylbenzyl trimethyl ammonium chloride 80% and methyldodecylxylylene bis(trimethyl ammonium chloride) 20%. 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.