Industrial
SOP also has many applications in industry. In addition to being widely used as a key ingredient in commercial fertilizer formulations, it also is important to the production of rubber, numerous medicines, firebrick and many construction materials. Industrial-grade potassium sulfate is being used successfully in the manufacture of high-quality drywall material. Added to the gypsum core, GSL potassium sulfate reacts chemically with the gypsum and dramatically speeds up the drying process. Unlike other materials, it contains practically no chloride to retain moisture or interfere with the set.