Citric acid is widely used in daily life, which has both industrial and food grade uses. It is a commonly used food additive.

檸檬酸是一種有機(jī)酸，也叫枸櫞酸，外觀為無色晶體，易溶于水，有工業(yè)級檸檬酸、食品級檸檬酸，含水量的不同分為一水檸檬酸和無水檸檬酸。在室溫下為無色半透明晶體或白色顆?；虬咨Y(jié)晶性粉末，在熱水中結(jié)晶時會生成無水合物，在冷水中結(jié)晶時會生成一水合物。

Citric acid is an organic acid, also known as citric acid. It has a colorless crystal appearance and is easily soluble in water. There are industrial grade citric acid and food grade citric acid. Different water contents can be divided into monohydrate citric acid and anhydrous citric acid. It is colorless translucent crystal or white particle or white crystalline powder at room temperature. It will generate non hydrate when crystallized in hot water, and monohydrate when crystallized in cold water.

檸檬酸有溫和的酸味用于各種飲料、汽水、糖果、點心、餅干等食品的制造中。無水檸檬酸多用于固體飲料，一分子結(jié)晶水檸檬酸多用作清涼飲料、果汁、水果糖、罐頭等酸性調(diào)味劑，也是食用油的抗氧化劑，可改善食品的性狀增強食欲和促進(jìn)鈣、磷物質(zhì)的吸收。檸檬酸的鹽類是某些食品需要添加鈣離子和鐵離子的強化劑。

Citric acid has a mild sour taste and is used in the manufacture of various beverages, sodas, candy, snacks, biscuits and other foods. Anhydrous citric acid is mostly used in solid drinks, and monomolecular crystalline water citric acid is mostly used as acidic flavoring agents such as cool drinks, fruit juice, fruit sugar, cans, etc. It is also an antioxidant of edible oil, which can improve the properties of food, enhance appetite, and promote the absorption of calcium and phosphorus substances. The salts of citric acid are the fortifiers that some foods need to add calcium ions and iron ions.

用檸檬酸或檸檬酸鹽作助洗劑可改善洗滌產(chǎn)品的性能，使金屬離子沉淀防止污染物重新附著在織物上維持洗滌需要的堿性。檸檬酸是一種良好的螯合劑，可提高活性劑的性能?？捎米鹘ㄖ沾纱纱u的耐酸性的試劑。檸檬酸和改性檸檬酸制成的防皺整理劑用于純棉織物的防皺整理，效果好且成本低。檸檬酸在80°C的情況下有很好的殺滅細(xì)菌芽孢的作用，對食品衛(wèi)生很有好處。

Using citric acid or citrate as a detergent aid can improve the performance of the washing product, make metal ions precipitate and prevent pollutants from re attaching to the fabric to maintain the alkalinity required for washing. Citric acid is a good chelating agent, which can improve the performance of the active agent. It can be used as an acid resistant reagent for building ceramic tiles. The anti crease finishing agent made of citric acid and modified citric acid is used for anti crease finishing of pure cotton fabric with good effect and low cost. Citric acid has a good effect on killing bacterial spores at 80 ° C, which is good for food hygiene.

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