Description
Nessler’s Reagent is a chemical solution composed of potassium iodide, mercuric chloride, and potassium hydroxide in aqueous form. Its chemical formula is K₂HgI₄, and it is widely used in laboratories to detect the presence of ammonia in a given sample.
When it comes into contact with ammonia, it undergoes a distinct color change, typically turning pale brown, or forming a yellow to brown precipitate, depending on the concentration. This color reaction provides a quick and visual confirmation of ammonia in qualitative analysis.
Details of Nessler’s Reagent
- Pack Size: 500mL
- Packed in: Bangladesh
- Application: Ammonia detection in water, soil, and laboratory samples

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