High Quality ammonium sulfide with CAS number 12135 - 76 - 1 is a chemical compound with significant industrial applications. Ammonium sulfide is typically presented as a colorless or yellowish liquid. The chemical formula of ammonium sulfide is (NH₄)₂S. It has a characteristic pungent odor, similar to that of ammonia and rotten eggs, which is due to the presence of hydrogen sulfide gas in equilibrium with the compound in solution.
In terms of purity, the high - quality ammonium sulfide we offer meets strict industry standards. It is carefully refined to ensure a low level of impurities, which is crucial for its various applications. The specific gravity of ammonium sulfide solution can vary depending on its concentration, but it generally has a density slightly higher than water.
For storage, it should be kept in a cool, dry, well - ventilated place away from heat, open flames, and strong oxidizing agents. The compound is sensitive to air and moisture, and over time, it may decompose, releasing toxic hydrogen sulfide gas.
1. **Chemical synthesis**: Ammonium sulfide is widely used as a reducing agent in chemical reactions. It can react with metal salts to form metal sulfides, which are important intermediates in the synthesis of various materials such as pigments, catalysts, and semiconductors.
2. **Textile industry**: In the textile industry, it is used for desulfurization and bleaching processes. It helps to remove sulfur - containing impurities from fabrics, improving their quality and appearance.
3. **Analytical chemistry**: As a reagent in analytical chemistry, ammonium sulfide can be used for the detection and separation of metal ions. It forms insoluble sulfide precipitates with many metal ions, which can be analyzed further to determine the presence and concentration of these metals.
When using ammonium sulfide, it is essential to follow strict safety procedures. Always wear appropriate personal protective equipment, including gloves, goggles, and a respirator to prevent inhalation of the toxic fumes.
For chemical synthesis, the appropriate amount of ammonium sulfide is added slowly to the reaction mixture under controlled conditions, such as a specific temperature and pH. Stirring is often required to ensure thorough mixing and reaction.
In the textile industry, the fabric is usually soaked in a solution containing ammonium sulfide for a certain period. The concentration of the solution and the soaking time need to be optimized according to the type of fabric and the desired effect.
In analytical chemistry, a small amount of ammonium sulfide solution is added to the sample solution. If metal ions are present, a precipitate will form, which can be separated by filtration and analyzed further.
**Case 1: Pigment synthesis**
A chemical company was synthesizing a new type of metal sulfide pigment. They used high - quality ammonium sulfide as the sulfide source. By carefully controlling the reaction conditions, including the ratio of reactants, temperature, and reaction time, they were able to produce a pigment with excellent color stability and high purity. The pigment was then used in the production of high - end paints and coatings, meeting the strict quality requirements of the market.
**Case 2: Textile treatment**
A textile factory was facing problems with sulfur - containing impurities in their cotton fabrics, which affected the dyeing process. They used ammonium sulfide in the desulfurization step. After optimizing the concentration of the ammonium sulfide solution and the treatment time, they were able to effectively remove the sulfur impurities. As a result, the fabrics had a better dyeing effect, and the color fastness was significantly improved.
**Case 3: Metal ion analysis**
In a research laboratory, scientists were analyzing a water sample for the presence of heavy metal ions. They added a small amount of ammonium sulfide solution to the sample. A black precipitate formed, indicating the presence of certain metal ions. Through further analysis of the precipitate, they were able to identify and quantify the heavy metal ions in the water sample, which was crucial for environmental monitoring and pollution control.
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