食品行业：作为酸味剂、调味剂和防腐保鲜剂，广泛应用于碳酸饮料、果汁、罐头、糖果等食品，能调节风味并延长保质期。

Food industry: As an acidifier, flavoring agent, and preservative, it is widely used in carbonated beverages, juices, canned foods, candies, and other foods, capable of adjusting flavor and extending shelf life。

化工行业:用于生产柠檬酸盐、抗氧化剂、增塑剂及洗涤剂，在电镀液中作络合剂，调整pH值并提升金属沉积质量。

Chemical industry: Used for producing citrate, antioxidants, plasticizers, and detergents, serving as a complexing agent in electroplating solutions, adjusting pH values, and enhancing the quality of metal deposition.

医药行业：作为药用辅料和pH调节剂，在药物制备中调节酸碱度，部分产品（如柠檬酸铁铵）用于治疗缺铁性贫血。

Pharmaceutical industry: As a pharmaceutical excipient and pH regulator, it adjusts the acidity and alkalinity in drug preparation. Some products (such as ferric ammonium citrate) are used to treat iron deficiency anemia.

化妆品与个人护理：用作pH调节剂、抗氧化剂，帮助维持产品稳定性，防止成分氧化变质，常见于乳液、洗发水等护肤品。

Cosmetics and personal care: Used as a pH regulator and antioxidant, it helps maintain product stability and prevent oxidative deterioration of ingredients. It is commonly found in emulsions, shampoos, and other skincare products.‌

‌其他作用：
农业‌：调节土壤pH值，改善植物养分吸收。 ‌
电子元件‌：清洗金属表面氧化物，保障元件性能。 ‌
建筑‌：作为缓凝剂提升混凝土施工性能。

Other functions:
Agriculture: Regulate soil pH and improve nutrient absorption by plants. ‌
Electronic components: Clean the oxides on metal surfaces to ensure component performance. ‌
Construction: used as a retarder to enhance the workability of concrete.