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[Chemical Knowledge]:What is the difference between acetic anhydride and acetic acid?

Acetic anhydride and acetic acid are two common chemicals, which have important applications in chemical, pharmaceutical, food and other fields. Although their names are similar, they are actually quite different.

acetic anhydride, chemical formula (CH3CO)2O, is a kind of organic compounds, common aliases are acetic anhydride, acetic acid anhydrous, etc. It is a flammable colorless liquid with a pungent odor. It is mainly used as a raw material for organic synthesis, and can also be used as a solvent and magic modifier. The molecular structure of acetic anhydride contains two acetyl groups, so its chemical properties are more active and prone to chemical reactions.

and acetic acid is the main component of common vinegar in our daily life, chemical formula is CH3COOH, usually a colorless liquid, pungent smell, sour. Acetic acid is widely used in food, medicine, agriculture, chemical and other fields, and is a very important organic acid. The molecular structure of acetic acid contains an acetyl group and a hydroxyl group. Its chemical properties are relatively stable and it is not prone to chemical reactions.

From the chemical structure point of view, the main difference between acetic anhydride and acetic acid is their molecular structure. Acetic anhydride contains two acetyl groups in a molecule, while acetic acid contains only one acetyl group in a molecule. This difference leads to differences in their chemical properties, uses, etc. The chemical properties of acetic anhydride are more active, easy to occur esterification reaction and acetic acid reaction, and the chemical properties of acetic acid is relatively stable.

In addition, during use, acetic anhydride and acetic acid also need to pay attention to their safety. Acetic anhydride as a flammable liquid, storage and use of the need to pay attention to fire and explosion, avoid contact with open flame and high temperature. And acetic acid as a food additive, should pay attention to prevent swallowing and contact with skin and eyes.

In general, acetic anhydride and acetic acid are two different chemicals, which have obvious differences in structure, chemical properties and uses. In the process of use and application, it is necessary to select appropriate chemicals according to the specific situation and follow relevant safety operating procedures to ensure safety and effectiveness during use.

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