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Potassium sulfate

CAS No.7778-80-5
Chemical Name:Potassium sulfate
CBNumber:CB9854321
Molecular Formula:K2O4S
Formula Weight:174.2592
MOL File:7778-80-5.mol

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/nm b/nm c/nm α/o β/o γ/o V/nm3
0.7456 0.5776 1.008 90 90 90
Dielectric constant 5.9（0.0℃）
Stability Stable.
InChIKey OTYBMLCTZGSZBG-UHFFFAOYSA-L
CAS DataBase Reference 7778-80-5(CAS DataBase Reference)
FDA 21 CFR 184.1643; 582.1643; 558.311
Substances Added to Food (formerly EAFUS) POTASSIUM SULFATE
EWG's Food Scores 1
NCI Dictionary of Cancer Terms SOP
FDA UNII 1K573LC5TV
NIST Chemistry Reference Potassium sulfate(7778-80-5)
EPA Substance Registry System Potassium sulfate (7778-80-5)
UNSPSC Code 12352302
NACRES NB.24

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.7456	0.5776	1.008	90	90	90

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

NFPA 704:

	1
1		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H302-H315-H319-H335
Precautionary statements P260-P262-P305+P351+P338

Potassium sulfate Price More Price(38)

Brand: Sigma-Aldrich(India)
Product number: P9458
Product name : Potassium sulfate
Purity: BioXtra, ≥99.0%
Packaging: 250G
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Updated: 2022/06/14
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Brand: Sigma-Aldrich(India)
Product number: P9458
Product name : Potassium sulfate
Purity: BioXtra, ≥99.0%
Packaging: 1KG
Price: ₹17298.35
Updated: 2022/06/14
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Brand: Sigma-Aldrich(India)
Product number: P0772
Product name : Potassium sulfate
Purity: ReagentPlus?, ≥99.0%
Packaging: 250G
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Brand: Sigma-Aldrich(India)
Product number: P8541
Product name : Potassium sulfate
Purity: suitable for plant cell culture
Packaging: 1KG
Price: ₹9839.93
Updated: 2022/06/14
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Brand: Sigma-Aldrich(India)
Product number: P0772
Product name : Potassium sulfate
Purity: ReagentPlus?, ≥99.0%
Packaging: 1KG
Price: ₹8638.35
Updated: 2022/06/14
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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,K2804, also known as salt of Lemery and arcanite, is a colorless crystalline solid that melts at 1072°C(1960 OF). It is soluble in water,but insoluble in alcohol. Potassium sulfate is used in manufacturing glass, aluminum, fertilizers, and in medicine.
Chemical Properties Potassium sulfate, sulfate of potash, K2SO4, white solid, soluble. Common constituent of potassium salt minerals.
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.
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 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 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