Potassium sulphate (K2SO4) ( potassium sulfate, also called sulphate of potash, arcanite, or archaically known as potash of sulfur) is a non-flammable white crystalline salt which is soluble in water.

1, use in fertilizer. K2SO4 does not contain chloride, which can be harmful to some crops. Potassium sulfate is preferred for these crops, which include tobacco and some fruits and vegetables. Crops that are less sensitive may still require potassium sulfate for optimal growth if the soil accumulates chloride from irrigation water.

2, used as a flash reducer in artillery propellant charges. It reduces muzzle flash, flareback and blast overpressure.

3, used as an alternative blast media similar to soda in soda blasting as it is harder and similarly water-soluble.

Store in dry and ventilated warehouse away from moisture and fire.