Unverified90% confidenceDecision RuleTime unknown
冷藏豆腐干含水量高、防腐剂少，保质期通常仅7-30天，购买时优先选生产日期3天内且需全程冷链的产品，常温货架上的'冷藏豆腐干'已破坏保鲜条件
1
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90%
Confidence
Long-term
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Unverified散装现做豆腐没有防腐剂但保质期极短，需当天买当天吃，冷藏也不超过2天；盒装保鲜豆腐（无菌包装）冷藏可存3-7天，长效UHT内酯豆腐常温可存数月，按食用节奏选包装形式92% similarUnverified鲜豆腐皮冷藏保质期通常仅2-3天，购买时查看生产日期须在当日或前一日；干豆腐皮（腐竹/干张）常温可存6-12个月，适合囤货92% similarUnverified常温保存的盒装豆腐（如内酯豆腐）多经UHT超高温灭菌，保质期可达3-6个月；冷藏水浸豆腐保质期通常仅3-7天，购买时优先看是否需冷藏而非只看日期长短92% similarUnverified含水量越高的豆腐越易变质：内酯豆腐冷藏保质期通常仅3-7天，散装现做老豆腐夏季当天吃完，盒装充氮或无菌包装豆腐可达15-30天。保质期超过45天的常温豆腐多为高温灭菌，风味和口感明显下降92% similarUnverified冷藏盒装豆腐开封后需换水浸泡（清水没过豆腐）并冷藏，每天换水可保存2-3天；未开封盒装看保质期，冷藏鲜豆腐一般仅3-7天，超过应警惕防腐剂或已变质91% similar
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