The invention relates to a composition for bactericide production, comprising (A) an ester of a polyhydric alcohol and an organic acid having a hydrocarbon group which may have a hydroxyl group and (B1) hydrogen peroxide, and having a water content of 1 to 25% by weight. From the composition, a bactericide is obtained as an aqueous solution containing an organic peracid.本發明係關於一種殺菌劑製造用組合物，其含有(A)多元醇與具有烴基亦可具有羥基之有機酸的酯以及(B1)過氧化氫，且水分含有量為1~25重量%。自該組合物，可獲得作為含有有機過氧酸之水溶液之殺菌劑。
