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[Chemical Knowledge]：What are the upstream raw materials for p-hydroxybenzoic acid? What are the downstream products?

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Para-hydroxybenzoic acid (also known as salicylic acid) has a wide range of applications in the field of chemical production raw materials. Its upstream and downstream related products are numerous, mainly related to medicine, cosmetics, food and other fields. The following are some of the main upstream and downstream related products.

1. Upstream products:

(1) Phenol: Phenol is one of the important raw materials of p-hydroxybenzoic acid. p-hydroxybenzoic acid can be produced through the oxidation reaction of phenol.

(2) Acetic acid: Acetic acid also plays an important role in the production of p-hydroxybenzoic acid. Acetic acid is used as a reaction medium or catalyst in some production processes.

2. Downstream products:

(1) Aspirin: p-hydroxybenzoic acid is one of the important raw materials for the synthesis of aspirin. Aspirin is a widely used antipyretic analgesic with anti-inflammatory, analgesic and antipyretic effects.

(2) methyl salicylate: p-hydroxybenzoic acid can react with salicylic alcohol to form methyl salicylate. Methyl salicylate is a fragrant compound that is commonly used as a fragrance and pharmaceutical intermediate.

(3) Parabens: Parabens can react with alcohols to form parabens. Such compounds are commonly used as food additives and preservatives, such as methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, etc.

above is only a part of the upstream and downstream related products of p-hydroxybenzoic acid. In fact, it has a wide range of applications and involves a wide range of products.

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