ChemicalBook > CAS DataBase List > Potassium sulfate

Potassium sulfate

Product Name
Potassium sulfate
CAS No.
7778-80-5
Chemical Name
Potassium sulfate
Synonyms
POTASSIUM SULPHATE;K2SO4;sop;231-915-5;KSO;Kso4;KSO2;KH2PO25;WATER R PHE;Kaliumsulfat
CBNumber
CB9854321
Molecular Formula
K2O4S
Formula Weight
174.2592
MOL File
7778-80-5.mol
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Potassium sulfate Property

Melting point:
1067°C
Boiling point:
1689°C
bulk density
800kg/m3
Density 
2.66
Flash point:
1689°C
storage temp. 
Inert atmosphere,Room Temperature
solubility 
H2O: 0.5 M at 20 °C, clear, colorless
form 
Very Fine Crystals or Powder
color 
White
Specific Gravity
2.662
Odor
Odorless
PH Range
~7
PH
5.5-7.5 (25℃, 0.5M in H2O)
biological source
synthetic
Water Solubility 
110 g/L (20 ºC)
λmax
λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
Merck 
14,7674
crystal system
Nogata
Space group
Pnma
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.74560.57761.008909090
Dielectric constant
5.9（0.0℃）
Stability:
Stable.
InChIKey
OTYBMLCTZGSZBG-UHFFFAOYSA-L
CAS DataBase Reference
7778-80-5(CAS DataBase Reference)
NIST Chemistry Reference
Potassium sulfate(7778-80-5)
EPA Substance Registry System
Potassium sulfate (7778-80-5)
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Safety

Safety Statements 
22-24/25
WGK Germany 
1
RTECS 
TT5900000
TSCA 
Yes
HS Code 
31043000
Hazardous Substances Data
7778-80-5(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 6600 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P262Do not get in eyes, on skin, or on clothing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
RES0797P-A7
Product name
Potassium sulfate
Purity
PharmaGrade, EP, Manufactured under appropriate GMP controls for pharma or biopharmaceutical production.
Packaging
1pkg
Price
$1690
Updated
2025/07/31
Sigma-Aldrich
Product number
1.05153
Product name
Potassium sulfate
Purity
for analysis EMSURE? ACS,ISO,Reag. Ph Eur
Packaging
500g
Price
$113
Updated
2025/07/31
Sigma-Aldrich
Product number
1.05153
Product name
Potassium sulfate
Purity
for analysis EMSURE? ACS,ISO,Reag. Ph Eur
Packaging
1kg
Price
$175
Updated
2025/07/31
Sigma-Aldrich
Product number
12658
Product name
Potassium sulfate
Purity
meets analytical specification of Ph. Eur., 99-101%
Packaging
1kg
Price
$148
Updated
2025/07/31
Sigma-Aldrich
Product number
1.05153
Product name
Potassium sulfate
Purity
for analysis EMSURE? ACS,ISO,Reag. Ph Eur
Packaging
5kg
Price
$612
Updated
2025/07/31
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Potassium sulfate Chemical Properties,Usage,Production

Description

Potassium sulfate (K2SO4) is a kind of chemical compounds that is commonly used in agriculture. The dominant application of potassium sulfate is as a fertilizer, which is commonly applied to offer both potassium and sulfur, thus improving the quality and yield of crops growing in soils that lack an adequate supply of this essential elements. Besides, the crude potassium sulfate is sometimes employed in the production of glass. It also has applications in other industries, which is used as a flash reducer in artillery propellant charges and as an alternative blast media similar to soda in the process of soda blasting.

potassium sulfate powder

Chemical Properties

Potassium sulfate (K₂SO₄), also known as sulphate of potash or arcanite, is a colorless crystalline solid that melts at 1072 °C (1960 °F). It is soluble in water but insoluble in alcohol. As a common constituent of potassium-containing minerals, it is used in the manufacture of glass, aluminum, fertilizers, and medicinal products.

Physical properties

Colorless or white crystals or white granules or powder; rhombohedral structure; bitter taste; density 2.66 g/cm3; melts at 1,069°C; vaporizes at 1,689°C; moderately soluble in water, 12 g/100mL at 25°C and 24g/100mL at 100°C; slightly soluble in glycerol; insoluble in alcohol, acetone, and carbon disulfide.

Occurrence

Potassium and sodium sulfates and their double sulfates with calcium and magnesium occur naturally in various salt lakes. Potassium sulfate also occurs in certain volcanic lava. Its double salt with magnesium occurs in nature, as the mineral langbeinite.
Potassium sulfate is used in fertilizers as a source of potassium and sulfur, both of which are essential elements for plant growth. Either in sim-ple form or as a double salt with magnesium sulfate, potassium sulfate is one of the most widely consumed potassium salts in agricultural applications. It is preferred over potassium chloride for certain types of crops; such as, tobac-co, citrus, and other chloride-sensitive crops. Some other applications include making gypsum cements; to make potassium alum; in the analysis of Kjeldahl nitrogen; and in medicine.

History

Potassium sulfate has been known since the early 14th century. It was studied by Glauber, Boyle, and Tachenius. In the 17th century, it was named arcanuni or sal duplicatum, as it was a combination of an acid salt with an alkaline salt. It was also known as vitriolic tartar and Glaser's salt or sal polychrestum Glaseri after the pharmaceutical chemist Christopher Glaser, who prepared and used it medicinally. From the early to mid-19th century, as understanding of plant nutritional requirements deepened and the fertilizer industry emerged, potassium sulphate began to be produced on a large scale as a vital potash fertiliser.

Uses

Potassium Sulfate is a flavoring agent that occurs naturally, consisting of colorless or white crystals or crystalline powder having a bitter, saline taste. it is prepared by the neutralization of sulfuric acid with potassium hydroxide or potassium carbonate.

Uses

Technical grades are used in fertilizers for manufacture of potassium alum, potassium carbonate and glass; the reagent grade is used in the Kjeldahl determination of nitrogen.

Uses

potassium sulfate is a reagent in cosmetics. Potassium sulfate is an inorganic salt with a primary function as a viscosity-increasing agent.

Production Methods

Potassium sulfate is produced by various methods, selection of process depending on availability and cost of raw materials.
The salt may be obtained from its naturally occurring mineral, langbeinite,K2SO4?2MgSO4. The ore first is crushed and washed with water to separate sodium chloride. After that, magnetite is separated from the washed langbei-nite by magnetic separation. After the separation of these two major impuri-ties, the purified double salt is treated with an aqueous solution of potassium chloride to obtain potassium sulfate:
K2SO4?2MgSO4 + 4KCl →3K2SO4+ 2MgCl2
The solution is filtered to remove insoluble residues and the products are separated from their aqueous mixture by crystallization.
Potassium sulfate also is produced from the mineral kieserite, MgSO4?H2O by treatment with potassium chloride. The intermediate double salt obtained reacts further with potassium chloride to form potassium sulfate:MgSO4?H2O + 2KCl + 4H2O →K2SO4?MgSO4?6H2O + MgCl2
K2SO4?MgSO4?6H2O + 2KCl →2K2SO4+ MgCl2
Potassium sulfate is separated from the more soluble magnesium chloride by crystallization.
Also, potassium sulfate can be made by two other processes in which no naturally occurring mineral is employed. In the Mannheim process, the salt is produced by action of sulfuric acid on potassium chloride:2KCl + H2SO4→K2SO4+ 2HCl
In Hargreaves process, which is a slight variation of the Mannheim method, potassium sulfate is made by heating a mixture of potassium chlo-ride, sulfur dioxide, air and water:4KCl + 2SO2+ 2H2O + o2→2K2SO4+ 4HCl.

Definition

Potassium sulfate is a potassium salt and an inorganic potassium salt. It is a white crystalline powder, K2SO4, soluble inwater and insoluble in ethanol;rhombic or hexagonal; r.d. 2.66; m.p.1069°C. It occurs naturally assch nite (Strassfurt deposits) and inlake brines, from which it is separatedby fractional crystallization. Ithas also been produced by the Hargreavesprocess, which involves theoxidation of potassium chloride withsulphuric acid. In the laboratory itmay be obtained by the reaction ofeither potassium hydroxide or potassiumcarbonate with sulphuric acid.Potassium sulphate is used in cements,in glass manufacture, as a food additive, and as a fertilizer(source of K+) for chloride-sensitiveplants, such as tobacco and citrus.

General Description

Potassium sulfate is an inorganic salt that can be prepared by reacting phosphogypsum and potassium chloride. It forms needlelike mullite particles on heating with aluminum sulfate (Al2(SO4)3) and silicon dioxide (SiO2). Its application to the soil has been reported to minimize the bronzing of rice plants. Its surface integration growth kinetics has been obtained in the temperature range of 20-50°C. The theoretical heat capacity curve of potassium sulfate in vapor phase has been obtained.

Flammability and Explosibility

Non flammable

Safety Profile

Moderately toxic to humans by ingestion. Moderately toxic experimentally by subcutaneous route. Swallowing large doses causes severe gastrointestinal tract effects. When heated to decomposition it emits toxic fumes of K2O and SOx. See also SULFATES.

Purification Methods

Potassium sulfate [7778-80-5] M 174.3, m 1069o, d 4 2.67 It crystallised from distilled water (4mL/g at 20o; 8mL/g at 100o) between 100o and 0o.

References

https://en.wikipedia.org/wiki/Potassium_sulfate
http://www.cropnutrition.com/potassium-sulfate
http://study.com/academy/lesson/what-is-potassium-sulfate-structure-uses-formula.html

Potassium sulfate Preparation Products And Raw materials

Raw materials

Potassium hydroxide Potassium carbonate Hydrochloric acid alunite Magnesium sulfate Potassium chloride Octadecanamine Ammonium sulfate Magnesium sulfate heptahydrate Sulfuric acid

Preparation Products

Compound fertilizer Aluminium potassium sulfate dodecahydrate ethyl 3-ethylpyrazolyl-5-carboxylate 4-Hydroxybenzoic acid Acenaphthylene Acrolein 4-[2-(diethylamino)ethoxy]benzophenone Nitrogen phosphorus potassium mixed fertilizer Potassium pyrosulfate Nitrogen-Phosphorus-Potassium compound fertilizer with sulphur Calcium phosphate monobasic Nicosulfuron N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine Potassium bicarbonate Mixed and compound fertilizer POTASSIUM METABISULFITE Pyruvic acid Potassium bromate Calcium phosphate dibasic ALPHA-D-GLUCOPYRANOSE 1-PHOSPHATE DIPOTASSIUM SALT HYDRATE Potassium persulfate AMMONIUM CHROMATE Compound fertilizer of potassium sulfate polyhalite Chromium(III) oxide Compound fertilizer,high concentration L-Methionine Water flush fertilizer
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View Lastest Price from Potassium sulfate manufacturers

Hebei Chuanghai Biotechnology Co., Ltd
Product
Potassium sulfate 7778-80-5
Price
US $10.00/KG
Min. Order
100KG
Purity
99%
Supply Ability
100 mt
Release date
2024-10-25
HebeiShuoshengImportandExportco.,Ltd
Product
Potassium sulfate 7778-80-5
Price
US $6.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
2000KG/Month
Release date
2024-08-06
Wuhan Biocar Pharmacy CO.,Ltd.
Product
Potassium sulfate 7778-80-5
Price
US $0.00-0.00/kg
Min. Order
1kg
Purity
0.99
Supply Ability
600kg
Release date
2025-02-21

7778-80-5, Potassium sulfateRelated Search:

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