Abstract: An improved bactericide, fungicide and viricide comprising about three parts weight didecyl dimethyl ammonium chloride having the structural formula of: ##STR1## and about two parts weight of n-akyl (C14 50%, C12 40%, C16 10%) dimethyl ammonium chloride having the structural formula of: ##STR2## where R equals (C14 50%, C12 40%, C16 10%) In specific embodiments, the composition of the invention may include a non-ionic detergent, a detergent builder, diluents and/or other non-active ingredients. The method of the invention comprises bringing an inaminate article into contact with a solution of the improved germicidal composition of the invention in an appropriate use-dilution concentration. Totally surprising kills of bacteria, fungus and viruses when the improved germicidal composition is diluted with water, hard water, water in the presence of about 5% weight organic soil and hard water in the presence of 5% weight organic soil simultaneously.