| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject composition containing a less amount of impurities harmful to human bodies, safe and useful for various products as a microbe- killing agent by formulating a specific component. SOLUTION: This mixture of 3-isothiazolone is obtained by mixing a biologically effective dose of a component A which is a mixture of 2-methyl-4- isothiazoline-3-one expressed by formula I with 5-chloro-2-methyl-4-isothiazoline-3- one expressed by formula II, a component B which is an effective dose of a metal nitrate stabilizer and a sufficient amount of water to dissolve the components A and B. In this case, 4, 5-dichloro-2-methyl-4-isothiazoline-3-one, which is an impurity, is preferably contaminated in <20ppm based on 15,000ppm of the component A. A chromaticity of the obtained composition is preferably <=50.</p> |
