What are the upstream raw materials for p-hydroxybenzoic acid? What are the downstream products?

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

1. Upstream items:(1) Phenol: Phenol is one of the crucial raw materials of p-hydroxybenzoic acid, which is able to be produced by the oxidation interaction of phenol.(2) Acetic acid: Acetic acid also plays an crucial role in the production of p-hydroxybenzoic acid. And Acetic acid is applied as a interaction medium or catalyst in some production processes. And

2. Downstream items:(1) Aspirin: p-hydroxybenzoic acid is one of the crucial raw materials to the synthesis of aspirin. Aspirin is a broadly applied antipyretic analgesic with anti-inflammatory, analgesic and antipyretic impacts.(2) Methyl salicylate: p-hydroxybenzoic acid is able to react with salicylic alcohol to generate methyl salicylate. Generally speaking Methyl salicylate is a fragrant compound that is frequently applied as a fragrance and medical intermediate.(3) p-hydroxybenzoic acid esters: p-hydroxybenzoic acid is able to react with alcohols to form p-hydroxybenzoic acid esters. Such compounds are frequently applied as food additives and preservatives, such as methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, etc. The above is only a part of the upstream and downstream related items of p-hydroxybenzoic acid. In fact, it's broadly applied and involves a wide variety of items.