Potassium Sulfate

content : 52%



The mineral form of potassium sulfate, arcanite, is relatively rare. Natural resources of potassium sulfate are minerals abundant in the Stassfurt salt. These are cocrystallizationsof potassium sulfate and sulfates of magnesium calcium and sodium.

Relevant minerals are:

     Kainite, MgSO4·KCl·H2O

    Schönite, K2SO4·MgSO4·6H2O

    Leonite, K2SO4·MgSO4·4H2O

    Langbeinite, K2Mg2(SO4)3

    Glaserite, K3Na(SO4)2

    Polyhalite, K2SO4·MgSO4·2CaSO4·2H2O

The potassium sulfate can be separated from some ofthese minerals, like kainite, because the corresponding salt is less soluble inwater.

Kieserite, MgSO4·H2O, can be combined with a solution of potassium chloride to produce potassium sulfate.






Potassium  – K2O

52% MIN


Sulphur  – S

18% MIN



1.5% MAX


Chloride (as Cl-)

1.5% MAX


Free Acid as H2SO4

1.5% MAX



White powder


    9.5kg/bag    640bags/20fcl    6.08mts/20fcl



Approximately 1.5 million tons were produced in1985,typically by the reaction of potassium chloride with sulfuric acid, analogous to the Leblanc process. Potassium sulfate is produced according to the followingreaction, which is conducted in so-called Mannheim furnaces:

2 KCl + H2SO4 → 2 HCl + K2SO4

The Hargreaves process uses sulfur dioxide, oxygen and water and potassium chloride as the starting materials to produce potassiumsulfate. Hydrochloric acid evaporates. SO2 is produced through theburning of sulfur.

Two crystalline forms are known. Orthorhombic β-K2SO4 is the common form, but itconverts to α-K2SO4 above 583 °C. These structures are complex, although the sulfate adoptsthe typical tetrahedral geometry.

Structure of β-K2SO4.

Coordination sphere of one oftwo types of K+ site.

SO4 environment in β-K2SO4.

It does not form a hydrate, unlike sodium sulfate. The salt crystallize as double six-sided pyramids,classified as rhombic. They are transparent, very hard and have a bitter, saltytaste. The salt is soluble in water, but insoluble in solutions of potassium hydroxide (sp. gr. 1.35), or in absolute ethanol.


The dominant use of potassium sulfate is as a fertilizer. K2SO4 does not contain chloride, which can be harmful to some crops. Potassiumsulfate is preferred for these crops, which include tobacco and some fruits andvegetables. Crops that are less sensitive may still require potassium sulfatefor optimal growth if the soil accumulates chloride from irrigation water.

The crude salt is also used occasionally in themanufacture of glass. Potassium sulfate is also used as a flash reducer in artillery propellant charges. It reduces muzzle flash, flareback and blast overpressure.

It is sometimes used as an alternative blast mediasimilar to soda in soda blasting as it is harder and similarly water-soluble.


It is the basic raw material for the production of various potassium salts such as potassium carbonate and potassium persulfate. It is used in glass industry as clearing agent, dye industry as intermediate, perfume industry as auxiliary agent and other medical industry as cathartic agent for the treatment of soluble barium salt poisoning
In addition, potassium sulfate is also used in industry for glass, dye, perfume, medicine and so on


Do not inhale dust
Avoid contact with skin and eyes

Company profile

     Qingdao Hisea Chem Co., Ltd is a famous chemical manufacture since 1996, located in Chemical Logistics Park of Qingdao port which is only 30 kilometers from the Qingdao port, and the traffic is very convenient.

     Based on the oil refining chemical plant of CNPC and Sinopec which distributed around of China,we product Glacial acetic acid, Formic acid, Nitric acid and hydrogen peroxide, and we produce sodium hydroxide,potassium hydroxide,sodium sulfide, potassium sulfate based on salt, potassium, magnesium, coal resources from the lop nurand the Qinghai lake .Reduplicating distillation the acids and the solvents and improving the product purity is to reach each field application, textile ,reagent and medical level etc. It is our top advantage to provide the high purity of products and make customized production according to the customer's requirements.We have our own sub-assembly factory, which can meet different needs of customers.

     Nowadays, we have exported to 70 countries around of the world and establish firm trade relationship.It would be our honor if you can contact with us and cooperate with us.

Hot Sale of Nitric Acid 68%-Qingdao Hiseachem

Hot Sale of Nitric Acid 68%-Qingdao Hiseachem