Provided is a method for industrially producing a triazolidinedione compound at a high purity and a high yield. A precipitation step for preparing a solution that contains a triazolidinedione compound represented by formula (1) and precipitating the triazolidinedione compound therefrom is performed. In this step, the pH of the solution is adjusted to 3.0 to 8.5 and the solution is prepared so as to contain 3-15 parts by volume of solvents for 1 part by mass of the triazolidinedione compound. (In the formula, R
1
is a substituted or unsubstituted amino group-bearing organic group.)
提供了一种工业上高纯度高产量生产三唑烷二酮化合物的方法。该方法包括通过沉淀步骤制备一个含有式(1)所表示的三唑烷二酮化合物的溶液,并从中沉淀出三唑烷二酮化合物。在该步骤中,将溶液的pH调整为3.0至8.5,并使溶液中含有3-15体积份的溶剂,以每1质量份三唑烷二酮化合物为基础。(在公式中,R1是一种取代或未取代的含
氨基的有机基团。)