ANTIBACTERIAL AGENT COMPOSITION

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PROBLEM TO BE SOLVED : To provide an antibacterial agent composition that inhibits proliferation of bacteria, especially gram-negative bacteria such as Escherichia coil, Pseudomonas aeruginosa and the like in an aqueous product and an aqueous raw material in a cosmetic field, an industrial field, a medical field, an agrochemical field and the like and further in a cooling water in a cooling tower, a cooling water for air conditioning and an industrial circulation water used in a papermaking process of a paper manufacturing industry and the like. SOLUTION : An antibacterial agent composition contains a zink salt or a copper salt and a rare earth salt. Particularly, the use of an antibacterial agent composition containing a hydroxy acid salt of zinc or copper and a rare earth salt such as a salt of lanthanum, cerium, gadolinium, ytterbium or the like can inhibit proliferation of bacteria, especially gram-negative bacteria such as Escherichia coil, Pseudomonas aeruginosa and the like in an aqueous product and an aqueous raw material in a cosmetic field, an industrial field, a medical field, an agrochemical field and the like, and in a circulation water for industrial use. SELECTED DRAWING : None COPYRIGHT : (C)2017, JPO&INPIT