Ammonium Sulfate (Analytical Reagent Grade) – Premium Lab Grade for Precision Analysis & Biochemical Research

Published for: Laboratory Chemicals, Research & Academic Procurement, Industrial QC Testing

Ammonium sulfate ((NH₄)₂SO₄) Analytical Reagent (AR) Grade is a high-purity laboratory chemical strictly formulated for qualitative and quantitative analysis, biochemical experiments, and standard laboratory synthesis. Unlike industrial-grade variants, AR-grade ammonium sulfate features extremely low impurity content, stable chemical properties, and consistent batch-to-batch performance, fully complying with mainstream laboratory reagent standards. It is one of the most essential universal reagents in analytical chemistry, molecular biology, and environmental testing laboratories worldwide.

1.Key Product Specifications：
Chemical Formula: (NH₄)₂SO₄
CAS Number: 7783-20-2
Purity: ≥99.0%
Insoluble Matter: ≤0.002%
Chloride Impurity: ≤0.0005%
pH Value (5% Aqueous Solution): 5.0–6.0
Appearance: White transparent crystalline powder, free-flowing, odorless
Solubility: Freely soluble in water, insoluble in ethanol and organic solvents

2.Core Advantages
AR-grade ammonium sulfate stands out for its ultra-low trace impurities and high chemical stability. Strict quality control eliminates interfering substances that may affect experimental results, ensuring high accuracy in titration, precipitation reactions, and sample testing. Each batch is tested and certified with a complete COA (Certificate of Analysis), supporting repeatable experimental data and meeting the rigorous requirements of academic research, institutional laboratories, and industrial quality control departments. In addition, its mild pH and excellent water solubility make it easy to prepare standard solutions and buffer systems without causing chemical denaturation of experimental samples.

3.Main Applications
Analytical Chemistry: Used for precipitation titration and quantitative detection of metal ions such as barium, strontium, and lead; serves as a standard reagent for solution calibration and impurity analysis.
Biochemical Research: The classic reagent for protein salting-out, precipitation, and fractionation, widely applied in protein purification, enzyme separation, and microbial culture medium preparation.
Laboratory Buffer Preparation: Assists in configuring stable pH buffer systems for electrochemical analysis, spectral testing, and environmental water sample detection.
Standard Experimental Reagent: Used for Kjeldahl nitrogen determination and other routine laboratory analytical tests, ensuring reliable and consistent experimental data.

4.Storage & Notes

Store in a cool, dry, well-ventilated laboratory warehouse, away from moisture and strong alkaline substances. Seal tightly after use to prevent deliquescence and impurity contamination. Non-flammable and non-toxic under normal use conditions; follow standard laboratory chemical operation specifications during handling.