FMB 1210-5 is a blend of a twin chain dimethyl quaternary ammonium chloride and an alkyl dimethyl benzyl ammonium chloride. When used as an active ingredient in FIFRA1 registered formulations such as hard surface disinfectants, sanitizers and/or certain types of water treatment formulations, these products have been found to provide superior biocidal action against a broad spectrum of microbial organisms such as: bacteria, fungi, viruses, and algae. This “fourth” generation quaternary ammonium compound delivers potent germicidal action in hard water and organic soil loads.