221325

Potassium sulfate

ACS reagent, ≥99.0%, powder or crystals

• Linear Formula: K₂SO₄
• CAS Number: 7778-80-5
• Molecular Weight: 174.26
• EC Number: 231-915-5
• MDL number: MFCD00011388
• UNSPSC Code: 12352302
• PubChem Substance ID: 329752258
• NACRES: NB.24

Properties

• grade: ACS reagent
• Quality Level: 200
• assay: ≥99.0%
• form: powder or crystals
• impurities: ≤0.01% insolubles; ≤5 ppm N compounds
• pH: 5.5-5.8 (25 °C, 5%)
• anion traces: chloride (Cl^-): ≤0.001%
• cation traces: Ca: ≤0.01%; Fe: ≤5 ppm; Mg: ≤0.005%; Na: ≤0.02%; heavy metals: ≤5 ppm (by ICP)
• SMILES string: [K+].[K+].[O-]S([O-])(=O)=O
• InChI: 1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
• InChI key: OTYBMLCTZGSZBG-UHFFFAOYSA-L

Description

General description

Potassium sulfate is a water-soluble inorganic salt that is commonly used in fertilizers. It can be prepared by reacting phosphogypsum and potassium chloride. K₂SO₄ can form needle-like mullite particles on heating with aluminum sulfate and silicon dioxide. Its application to the soil has shown to minimize bronzing of rice plants.

Application

Potassium sulfate may be used as a sulfonating agent in the preparation of 4′-dibenzo-18-crown-6-sulfonic acid via sulfonation of dibenzo-18-crown-6.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable