Ammonium Sulphate ER 500g Qualigens

Ammonium Sulphate (ER ACS) is a high-purity, analytical-grade ammonium sulfate ((NH4)2SO4), which is a white, crystalline solid that dissolves in water. The "ER" denotes "Extrapure Reagent," and "ACS" signifies that it meets or exceeds the stringent quality specifications set by the American Chemical Society for reagents used in analytical chemistry. This grade is characterized by its high purity (often >99.5%) and low levels of impurities like heavy metals, chloride, and insoluble matter, making it suitable for precise laboratory applications. Key Characteristics: 

• Chemical Formula: (NH4)2SO4
• Appearance: White or almost white crystalline solid or powder
• Odor: Odorless or nearly odorless
• Solubility: Highly soluble in water
• Purity: High purity (e.g., 99.5%), meeting ACS specifications
• Impurities: Very low levels of insoluble matter, heavy metals, chloride, and other potential contaminants
• pH: A 5% aqueous solution typically has a pH between 5.0 and 6.0
• Other Properties: High melting point (>280C)

"ER" (Extrapure Reagent): This designation from manufacturers like Loba Chemie and SRL Chem indicates a reagent of high purity, specifically intended for laboratory use where accurate and reliable analytical results are required. "ACS" (American Chemical Society): This certification means the product adheres to the quality standards set by the American Chemical Society for reagents. This ensures the chemical is suitable for analytical procedures, instrumental analysis, and other demanding laboratory work. Common Uses:

• Analytical Chemistry:Used as a high-purity reagent in laboratories for various analyses and tests. 
• Protein Precipitation:Employed in biochemistry for the "salting out" of proteins, where its high solubility allows for selective precipitation of proteins from a solution. 
• Soil Fertilizer (though typically a less pure grade):While a primary use for ammonium sulfate is as a fertilizer due to its nitrogen content, the ER ACS grade is generally too expensive and over-specified for bulk agricultural use.