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[Chemical Knowledge]:What are the upstream raw materials for phosphorous acid? What do the downstream products contain?

Phosphorous acid plays an important role in the field of chemical production raw materials, and its upstream and downstream related products are extensive. The following are some upstream and downstream related products related to phosphorous acid:

upstream products:

1. Yellow phosphorus: Phosphorous acid can be produced by the reaction of yellow phosphorus with water. Yellow phosphorus is phosphate rock after thermal processing, is the main raw material for the production of phosphorous acid.
2. Sulfuric acid: Sulfuric acid is used as a catalyst in the production of phosphorous acid to promote the reaction of yellow phosphorus with water.

downstream products:

1. Phosphate fertilizer: Phosphorous acid can be used to produce phosphate fertilizer, such as superphosphate, calcium magnesium phosphate fertilizer, etc. Phosphate fertilizer is an important fertilizer to promote plant growth and improve soil fertility.
2. Food additives: Phosphorous acid and its salts can be used as food additives, such as sodium phosphite, potassium phosphite, etc. They play the role of antiseptic and antioxidant in food.
3. Pharmaceutical intermediates: Phosphorous acid can be used as a pharmaceutical intermediate for the production of some drugs, such as anti-cancer drugs, antibacterial drugs, etc.
4. Plastic additives: Phosphite compounds can be used as plastic additives, such as antioxidants, flame retardants, etc., can improve the performance and processing performance of plastics.

In short, phosphorous acid has a wide range of upstream and downstream related products in the field of chemical production raw materials, which is of great significance for promoting industrial and agricultural production and improving people's living standards.
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