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L－苹果酸，化学名L－羟基丁二酸，分子式C４H６O５，外观为白色结晶或结晶粉末，有特殊的酸味，是一种天然存在的重要有机酸，广泛存在于蔬菜和水果中，其口感接近天然苹果的酸味。L－苹果酸的生产方法有以下几种：（１）水果萃取法。即将未成熟的苹果、葡萄、桃等水果的果汁
L-malic acid, chemical name L-hydroxy succinic acid, molecular formula C4H6O5, the appearance of white crystalline or crystalline powder, a special sour taste, is a naturally occurring organic acid, widely exist in vegetables and fruits, the taste Close to the sourness of natural apples. L-malic acid production methods are the following: (1) fruit extraction method. Is about immature apple, grape, peach and other fruit juice