Sulfamic acid The molecular formula of sulfamic acid is NH2S03H. The commercially available product is a white powder. As long as it is kept dry and not in contact with water at room temperature, the solid sulfamic acid does not absorb moisture and is relatively stable. The aqueous solution of sulfamic acid has the same strong acidity as hydrochloric acid and sulfuric acid, so it is also called solid sulfuric acid. It has the characteristics of non-volatile, odorless and minimal toxicity to the human body.
The aqueous solution of sulfamic acid has a slower effect on the corrosion products of iron. Some sodium chloride can be added to make it slowly produce hydrochloric acid, thereby effectively dissolving iron scale. The sulfamic acid aqueous solution can remove scale and corrosion products on the surface of equipment made of iron, steel, copper, stainless steel and other materials.
In addition, it is the only acid that can be used for cleaning galvanized metal surfaces. When cleaning with sulfamic acid aqueous solution, the temperature is generally controlled at no more than 66°C (to prevent sulfamic acid from decomposing), and the concentration is not more than 10%.
Sulfamic acid is an important fine chemical product, which is widely used in various industrial equipment and civil cleaning agents in the manufacture of metals and ceramics, petroleum blending agents and cleaning agents, electroplating industrial agents, electrochemical polishing agents, and asphalt emulsifiers. , Etchants, sulfonating agents for dyes, medicines and pigment industries, dyeing agents, high-efficiency bleaching agents, flame retardants for fibers, paper, softeners, resin crosslinking accelerators, herbicides, anti-blooming agents, and standard analytical reagents, etc. In various fields.
Sulfamic acid can be made into extremely pure crystals that are stable at room temperature. Its aqueous solution has the same strong acidity as hydrochloric acid and sulfuric acid, and is also known as solid sulfuric acid. It is non-volatile, non-hygroscopic, and has minimal toxicity to humans, but the skin should not be in contact with sulfamic acid for a long time, let alone enter the eyes. The production process of sulfamic acid is simple, the reaction is relatively easy to control, the raw materials and equipment are relatively easy to solve, the waste water is also easy to treat, and the by-products can be effectively used. The product can replace sulfuric acid, and its packaging, storage and transportation are very convenient.