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[Chemical Knowledge]：The difference between acrylic acid and propionic acid: understanding the properties and applications of these two chemicals

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Acrylic acid and propionic acid are two common organic chemicals, which have some differences in chemical structure, properties and applications. Understanding the properties of these two chemicals is very important for us to use them correctly in scientific research and practical applications.

From the chemical structure, acrylic acid and propionic acid are the hydrochloride and acetate salts of acrylate and propionate ions, respectively. The molecular formula of acrylic acid is C3H4O2, and its molecular structure contains an allyl group (-CH2CH = CH2) and a carboxyl group (-COOH). The molecular formula of propionic acid is C3H6O2, and its molecular structure contains a carboxyl group (-COOH) and a methyl group (-CH3). The properties of

acrylic acid and propionic acid are also different. Acrylic acid is a colorless liquid with a pungent odor at room temperature. It is highly corrosive and can form propionic acid with water. Acrylic acid is an active monomer that can be polymerized into ethyl acrylate, polyacrylic acid and other polymers, which are widely used in coatings, plastics, textiles, detergents and other industrial fields. Propionic acid is a colorless liquid with a pungent odor and sour taste. It is a common organic acid that can be used as a food additive and an intermediate for some drugs.

acrylic acid and propionic acid also differ in application. Due to the strong activity of acrylic acid, it is often used to prepare polymers in polymerization reactions. Polyacrylic acid is an important polymer with excellent water absorption and water retention, and is widely used in personal care products, medical materials, sanitary products and other fields. In addition, acrylic acid can also produce polymer compounds such as ethyl acrylate, acrylate copolymers, and butene copolymers. Propionic acid is commonly used in organic synthesis reactions and ethylene synthesis processes, and can also be used to prepare esters, dimethyl glutarate and specific organic acid salts.

In summary, acrylic acid and propionic acid differ in chemical structure, properties and applications. Understanding their characteristics helps us to use these two chemicals correctly and apply them to industry and scientific research. During use, attention should be paid to protective measures to avoid contact with skin and inhalation.

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