An antimicrobial composition and method for extending the shelf-life of water, food/feed or food/feed ingredients, comprising: 5-25 wt. % nonanoic acid, 1-25 wt.% organic acid ester, 1-50 wt. % of a single or mixture of C1-C24 aldehydes, a mixture of C1-C24 organic acids, and water.一種抗微生物組成物及用於延長水、食物/飼料或食物/飼料成分之儲藏期限的方法,該組成物包含:5-25 wt.%壬酸,1-25 wt.%有機酸酯,1-50 wt.%之單一C1-C24醛或C1-C24醛混合物,C1-C24有機酸之混合物,及水。