Overview of properties, preparation and applications of ferrous sulfate

Ferrous sulfate (FeSO₄) is an important inorganic compound widely used in industry, agriculture and medicine. This article will start from itschemical properties,Preparation method,Main purposeandManufacturerIt is expanded into four aspects, focusing on its functions as water treatment agent, fertilizer supplement and pharmaceutical raw material. In terms of content structure, it first outlines the basic characteristics of ferrous sulfate, then details its industrial preparation and agricultural applications, and finally lists common products and manufacturers on the market.

Chemical properties and preparation methods of ferrous sulfate

Ferrous sulfate usually exists in the form of heptahydrate (FeSO₄·7H₂O), which appears as blue-green crystals, is easily soluble in water, and is easily oxidized to ferric iron in the air. In industry mainly throughRecycling of steel pickling waste liquidorReaction of iron filings and sulfuric acidMade. The former is an environmentally friendly process that uses metallurgical by-products for purification; the latter reacts iron filings with dilute sulfuric acid and crystallizes them to obtain the finished product. In the laboratory, it can be prepared through the direct reaction of iron powder and sulfuric acid. The reaction equation is: Fe + H₂SO₄ → FeSO₄ + H₂↑.

Application of ferrous sulfate in agriculture and environmental protection

In agriculture, ferrous sulfate is used asiron fertilizerIt is used to correct soil iron deficiency yellowing disease, especially for acid-loving crops such as rhododendron and blueberry. Its aqueous solution can also be used for foliar spraying to quickly replenish iron. In terms of environmental protection, ferrous sulfate issewage treatmentA commonly used reducing agent that can remove heavy metals and phosphates from wastewater. In addition, it can also be used as a gas desulfurization agent, reacting with hydrogen sulfide to form iron sulfide precipitation.

Extended uses in medicine and industry

Medically, ferrous sulfate is the treatmentiron deficiency anemiapharmaceutical ingredients, but please note that excessive intake may cause gastrointestinal irritation. In industry, it is used in the manufacture of inks, dyes, and wood preservatives. In recent years, with the development of new energy, ferrous sulfate has also been used as the precursor of lithium iron phosphate, the cathode material of lithium batteries, further expanding its application scenarios.

Summary and market product information

The versatility of ferrous sulfate makes it an important chemical raw material across fields. The following table lists the major domestic manufacturers and product names:

Source of citation: 1. "Inorganic Chemistry" (Higher Education Press) - written by Zhang Qinglian 2. Agricultural application data refer to "China Soil Fertilizer" Issue 3, 2020 3. Manufacturer information comes from the public information on the official websites of each company