magic! The scope of action of chlorosulfonic acid is so wide

[alias]sulfonic acid chloride

[Molecular formula]HSO3Cl

［Property］Pure chlorosulfonic acid is a colorless oily liquid, the industrial product is generally slightly yellowish, and the crude product is black. It has a very strong pungent smell of hydrochloric acid. The relative density is 1.753, and the melting point is -80°C. The boiling point is 158°C, and the refractive index is 1.437 (14°C). Soluble in chloroform, dichloroethane, tetrachloroethane, insoluble in carbon tetrachloride and carbon disulfide, it will decompose when it meets water, and generate sulfuric acid and hydrogen chloride. pungent odor. It reacts chemically with alkali to generate sulfate and chloride. It can also be decomposed by acid and alcohol. React with organic compounds such as hydrocarbons, phenols and amines to form organic derivatives. Chlorosulfonic acid has a strong dehydration power. When the skin, clothing, wood, etc. touch it, it will absorb water immediately, destroying it and showing carbonization. It is extremely corrosive to ordinary metals in the air, and its other chemical properties are similar to those of concentrated sulfuric acid.

［Application］ Used in the manufacture of sulfa drugs, pesticides, saccharin, detergents, ion exchange resins, military gas and plastics, etc. In the dye industry, it is used to synthesize acid dyes, vat dyes and azo dyes, etc. It is also used as an intermediate (such as benzene, anthracene) and a sulfonating agent or chlorosulfonating agent for some dye precursors. It is also used as anti-sticking agent and coagulant, etc.

[Brief recipe]

①The sulfur monoxide gas generated by sulfur combustion is converted into sulfur trioxide by catalytic conversion, and then reacted with dry hydrogen chloride gas at 130-230°C to produce chlorine Sulfonic acid

②For a small amount of production, crude chlorosulfonic acid or concentrated sulfuric acid can be used as the mother liquor. The gas reacts in the liquid phase to form chlorosulfonic acid.

［Safety and Protection］ Chlorosulfonic acid is a class I inorganic acid corrosive substance, hazard code number: 91012. Use a special tank truck or a special metal can to hold, the net weight of each can is 5KG. There should be a “corrosion product” mark on the package. Store in a cool dry place. Do not store and transport together with oxidants, oils and flammable and explosive materials. In case of fire, yellow sand and dry powder fire extinguishing agent can be used to extinguish the fire, and water is strictly prohibited.

Skin contact is burnt and should be rinsed immediately with plenty of cool water, followed by medicinal badger oil.