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[Chemical Knowledge]：Properties and Uses of Urea

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Urea is an important raw material for chemical production, with unique properties and a wide range of uses. This article will detail the nature of urea and its use in the field of chemical production.

1. the nature of urea

1. physical properties of
urea is a colorless crystal or white powder, with high purity, soluble in water, low moisture absorption characteristics. Its molecular formula is CO(NH2)2, its molecular weight is 60.06, and it has a high nitrogen content (46.67%).

2. Chemical properties
urea has good chemical stability, but it will decompose under high temperature, strong acid, strong alkali and other conditions. The nitrogen atom in urea has high activity and can react with many substances, such as reacting with acids to generate ammonium salts, reacting with aldehydes, ketones, etc. to generate urea derivatives.

2. Urea Use

1. Nitrogen Fertilizer
Urea as an efficient nitrogen fertilizer, is widely used in agricultural production. Because it is easily soluble in water and easily absorbed by plants, it has a faster fertilizer effect. At the same time, urea also has the effect of improving soil, improving crop yield and quality.

2. Plastic Additive
Urea can be used as a plastic additive to improve the toughness, strength and heat resistance of plastics. For example, urea and formaldehyde reaction can be made into urea formaldehyde resin, used in the manufacture of plastic products.

3. pharmaceutical intermediates
urea can be used as pharmaceutical intermediates for the production of antibacterial drugs, anti-tumor drugs, anti-tuberculosis drugs and other drugs. For example, urea reacts with acetophenone to make acetophenone urea, which is used to treat conditions such as epilepsy.

4. Fuel Additive
Urea can be used as a fuel additive to reduce nitrogen oxide emissions in diesel engine exhaust. In diesel engines, urea reacts with nitrogen oxides in the exhaust to produce harmless nitrogen and water vapor, thereby reducing exhaust pollution.

In short, urea, as an important raw material for chemical production, is widely used in agricultural production, plastic manufacturing, pharmaceutical production and fuel additives.

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