Potassium sulfate

Description

Potassium sulfate · CAS 7778-80-5 · K2SO4. UNII 1K573LC5TV. Boiling Point: 1689 °C; Boiling Point: 1689 °C @760 [mm Hg]; Melting Point: 1067 °C.

Identification

CAS Registry Number	7778-80-5
PubChem CID	24507
Molecular formula	K2SO4
IUPAC name	dipotassium;sulfate
UNII (FDA)	1K573LC5TV

Computed Descriptors

Molecular Weight	174.26
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	0
Exact Mass	173.87914262
Monoisotopic Mass	173.87914262
Topological Polar Surface Area	88.6
Heavy Atom Count	7
Formal Charge	0
Complexity	62.2

Physical & Chemical Properties

Boiling Point	1689 °C
Boiling Point	1689 °C @760 [mm Hg]
Melting Point	1067 °C
Density	2.66
Density	2.66 g/cm³
Density	2.66 @25 °C
Other Experimental Properties	TRANSITION POINT: 588 °C

Physical description & handling notes

• Dry Powder; Large Crystals; Liquid; Liquid; Other Solid; Dry Powder; Other Solid; Large Crystals; CBI
• Colourless or white crystals or crystalline powder
• Colorless or white odorless solid; [Merck Index] Colorless crystalline solid; [MSDSonline]
• COLOURLESS-TO-WHITE CRYSTALS.
• COLORLESS OR WHITE CRYSTALS, OR WHITE GRANULES OR POWDER
• COLORLESS, RHOMBIC OR HEXAGONAL CRYSTALS

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT, MALTING OR FERMENTING AID FLAVOUR_ENHANCER; SALT_SUBSTITUTE: Food Additives NOT SPECIFIED TRS 733-JECFA 29/26 CIR / INCI: Viscosity controlling; Bulking
GHS notification summary	89% (517 / 581)

GHS Hazard Classification

GHS notification summary	89% (517 / 581)
Reported hazard statements	H318 (10.2%)

Documented Uses

• Used in gypsum cements, to make alum and glass, as a food additive, in fertilizers, as an accelerator in wallboard, as an expansion control agent for dental materials, as a medical and veterinary cathartic, and as a veterinary sulfate source; [HSDB]
• Cement Producing [Category: Industry]
• Glass Manufacturing [Category: Industry]
• REAGENT IN ANALYTICAL CHEMISTRY; MEDICINE; GYPSUM CEMENTS; ALUM MFR; FOOD ADDITIVE
• (VET): CATHARTIC, SULFATE SOURCE
• FERTILIZER FOR CHLORIDE-SENSITIVE CROPS (EG, TOBACCO); ACCELERATOR IN WALLBOARD (CONSTRUCTION INDUSTRY); AGENT IN MFR OF GLASS; CATHARTIC IN HUMAN MEDICINE; WATER-CORRECTIVE AGENT FOR FOODS (EG, BREWERY WATER); SETTING-EXPANSION CONTROL AGENT FOR DENTAL MATERIALS

Synonyms

POTASSIUM SULFATE; 7778-80-5; Dipotassium sulfate; Potassium sulphate; Sulfuric acid dipotassium salt; Arcanum duplicatum; Sulfuric acid, dipotassium salt; Kalium sulphuricum; Tartarus vitriolatus; Kali sulphuricum; Potassium sulfate (K2(SO4)); K2SO4; Sulfuric acid potassium salt (1:2); 1K573LC5TV; Potassium (as sulfate); DTXSID6029701

Frequently Asked Questions

What are the CAS number and molecular formula of Potassium sulfate?

CAS 7778-80-5; molecular formula K2SO4; molecular weight — g/mol.

What other names is Potassium sulfate known by?

POTASSIUM SULFATE, 7778-80-5, Dipotassium sulfate, Potassium sulphate, Sulfuric acid dipotassium salt, Arcanum duplicatum.

What is the regulatory status of Potassium sulfate?

Documented regulatory listings: FDA Substance added to food: FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT, MALTING OR FERMENTING AID; FLAVOUR_ENHANCER; SALT_SUBSTITUTE: Food Additives; NOT SPECIFIED.

Is Potassium sulfate classified as hazardous?

89% of GHS notifications report no hazard classification (517 of 581).

What are the key physical properties of Potassium sulfate?

Boiling Point: 1689 °C; Boiling Point: 1689 °C @760 [mm Hg]; Melting Point: 1067 °C; Density: 2.66.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.