Potassium Sulfate, ACS Grade *

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About Potassium Sulfate, ACS Grade

Potassium Sulfate, also known as Sulfate of Potash, Dipotassium sulfate, and Potassium Sulfate (2:1), appears colorless or white crystals or crystalline granular powder having bitter saline taste and is Water-soluble at ambient conditions. When heated to decomposition, it emits toxic fumes of Sulfur Oxides. An ACS Grade reagent is a chemical that meets the purity requirements of the American Chemical Society (ACS). It is generally equivalent to the Analytical Reagent Grade. For dependable, consistent, and repeatable findings, ACS Grade reagents can be utilized in high- quality research labs. In the United States of America (USA), Lab Alley sells its high-quality Potassium Sulfate, Granular, ACS Grade online at laballey.com.

Common Uses and Applications

  • Fertilizer: Potassium sulfate is a significant source of potassium, an essential nutrient for plant growth. It is commonly used in agriculture as a fertilizer to enhance crop yields and improve the quality of fruits, vegetables, and other crops. It is particularly favored in crops where chloride-sensitive crops, such as tobacco, grapes, and certain fruits, are grown.
  • Industrial Applications: Potassium sulfate is utilized in various industrial processes, such as the production of glass, ceramics, and glazes. It can act as a flux, helping to lower the melting point of materials and improve their flow properties during manufacturing.
  • Chemical Manufacturing: Potassium sulfate serves as a raw material in the manufacturing of various chemicals, including potassium carbonate, potassium hydroxide, and potassium alum. These chemicals are used in industries such as soap production, detergent manufacturing, and water treatment.
  • Laboratory Reagent: In laboratory settings, potassium sulfate is used as a reagent in chemical reactions and analytical procedures. It may be employed in precipitation reactions, as a source of potassium ions, or as a component of buffer solutions.
  • Food Additive: Potassium sulfate may be used as a food additive in certain processed foods, primarily as a source of potassium. It is generally recognized as safe (GRAS) by regulatory agencies when used in accordance with good manufacturing practices.
  • Medicinal Applications: While less common, potassium sulfate has been used in traditional medicine for its purported health benefits. However, its medicinal use is limited compared to other potassium salts due to its relatively low solubility and availability.


Chemistry Table


Potassium Sulfate, ACS Grade Specifications

Assay Min 99.0%
pH of a 5% Solution @ 25°C 5.5-8.5
Insoluble Matter 0.01%
Chloride 0.001%
Nitrogen Compounds 5 ppm
Calcium, Magnesium, & R2O3 Ppt 0.02%
Heavy Metals (as Pb) 5 ppm
Iron 5 ppm
Sodium 0.02%

Safety and Shipping Information

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Potassium Sulfate Granular ACS.

Certificates of Analysis

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