Basic Introduction to Insoluble Sulfur

Insoluble sulfur (Su) is a non-toxic, flammable yellow powder, named for its insolubility in carbon disulfide. It is produced by the thermal polymerization of ordinary sulfur. The number of sulfur atoms in its molecular chain is as high as 108 or more, exhibiting the viscoelasticity and molecular weight distribution of polymers; therefore, it is also called elastic sulfur or polymeric sulfur. It belongs to the category of inorganic polymer chemical raw materials.