PROBLEM TO BE SOLVED: To provide a powdery storable duration improver for food products having an excellent preservation effect, also having a reduced influence on the taste quality of food products and further having satisfactory storage stability.SOLUTION: Provided is a powdery storable duration improver for food products comprising sodium acetate, acetic acid of 5 to 15 wt.%, higher branched cyclic dextrin of 2 to 30 wt.%, and the salt of organic acid having a carboxyl group and a hydroxyl group, and in which the ratio in the number of the hydroxylic group/the number of the carboxyl group is 0.5 or more, in which the acetic acid root of the storable duration improver is 60 to 68 wt.%, and also, pH upon preparation of a 1 wt.% aqueous solution is 4.5 to 5.8.SELECTED DRAWING: None【課題】優れた保存効果を持ち、かつ食品の味質に与える影響が少なく、さらに保管安定性の良い食品用粉末状日持ち向上剤を提供すること。【解決手段】酢酸ナトリウム、酢酸５～１５重量％、高度分岐環状デキストリン２～３０重量％、並びにカルボキシル基と水酸基を有し、水酸基数／カルボキシル基数が０．５以上である有機酸の塩を含有する食品用粉末状日持ち向上剤であって、日持ち向上剤の酢酸根が６０～６８重量％であり、かつ１重量％水溶液を調製した際のｐＨが４．５～５．８である、食品用粉末状日持ち向上剤を提供する。【選択図】なし
