This article provides an in-depth overview of CAS 10213-79-3, which refers to sodium metasilicate pentahydrate. It covers the chemical properties, applications, safety considerations, production methods, and environmental impact of this compound. By exploring these aspects, the article aims to offer a comprehensive understanding of sodium metasilicate pentahydrate, its significance in various industries, and the importance of its proper handling and usage.
Sodium metasilicate pentahydrate, with the chemical formula Na2Si2O7·5H2O, is a white, crystalline solid that is widely used in various industries. It is a hydrated form of sodium metasilicate, which is a salt of sodium and silicic acid. This compound is known for its unique properties, such as its ability to act as a buffering agent, stabilizer, and preservative. In this article, we will delve into the details of sodium metasilicate pentahydrate, including its chemical properties, applications, safety considerations, production methods, and environmental impact.
Sodium metasilicate pentahydrate is a white, crystalline solid that is odorless and has a slightly bitter taste. It is highly soluble in water and forms a clear, colorless solution. The compound is also stable in dry air but can absorb moisture from the atmosphere, leading to the formation of a gel. It has a melting point of approximately 580°C and decomposes into sodium silicate and water above this temperature. The solubility of sodium metasilicate pentahydrate in water increases with temperature, making it a valuable component in various industrial processes.
Sodium metasilicate pentahydrate finds extensive use in various industries due to its unique properties. Some of the primary applications include:
1. **Water Treatment**: Sodium metasilicate pentahydrate is used as a coagulant in water treatment plants to remove impurities and improve water quality.
2. **Detergents and Cleaning Agents**: It acts as a buffering agent and stabilizer in detergents, helping to maintain the pH balance and effectiveness of cleaning agents.
3. **Food Industry**: Sodium metasilicate pentahydrate is used as a preservative and stabilizer in food products, such as baked goods, to prevent spoilage and maintain texture.
While sodium metasilicate pentahydrate is widely used, it is important to consider its safety profile. The compound is generally considered safe for use in food and water treatment applications. However, it is classified as a mild irritant to the skin and eyes. Proper handling and protective equipment, such as gloves and goggles, should be used when working with this compound. Ingestion of sodium metasilicate pentahydrate can cause gastrointestinal irritation, and exposure to high concentrations can lead to respiratory irritation.
Sodium metasilicate pentahydrate is produced through various methods, including:
1. **Chemical Synthesis**: The compound can be synthesized by reacting sodium hydroxide with silicon tetrachloride in the presence of water.
2. **Hydration of Sodium Metasilicate**: Sodium metasilicate can be hydrated to form sodium metasilicate pentahydrate by adding water to the anhydrous form.
3. **Recycling**: The compound can also be produced through the recycling of industrial waste streams, such as from the production of glass and ceramics.
The environmental impact of sodium metasilicate pentahydrate is relatively low compared to other chemicals. However, it is important to manage its disposal properly to minimize any potential harm to the environment. The compound is biodegradable and does not persist in the environment. Nonetheless, it is advisable to avoid releasing it into water bodies, as it can affect aquatic life at high concentrations.
Sodium metasilicate pentahydrate, with the CAS number 10213-79-3, is a versatile compound with a wide range of applications. Its chemical properties, safety considerations, production methods, and environmental impact are crucial factors to consider when using this compound. By understanding these aspects, industries can ensure the safe and effective use of sodium metasilicate pentahydrate, contributing to sustainable practices and environmental stewardship.
Sodium metasilicate pentahydrate, CAS 10213-79-3, chemical properties, applications, safety considerations, production methods, environmental impact
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