Abstract

This article provides an in-depth overview of Sodium 2-Naphthol-7-Sulfonate, a compound with the CAS number 135-55-7. It delves into its chemical properties, synthesis methods, applications, safety considerations, environmental impact, and regulatory status. By exploring these aspects, the article aims to offer a comprehensive understanding of this compound and its significance in various industries.

Introduction to Sodium 2-Naphthol-7-Sulfonate

Sodium 2-Naphthol-7-Sulfonate, also known as 2-naphthol-7-sulfonic acid sodium salt, is a chemical compound that belongs to the naphthol sulfonate family. It is widely used in various industries due to its unique properties and applications. This compound is characterized by its yellowish-brown crystalline appearance and is soluble in water. In this article, we will explore the various aspects of Sodium 2-Naphthol-7-Sulfonate, including its chemical structure, synthesis, and uses.

Chemical Properties of Sodium 2-Naphthol-7-Sulfonate

Sodium 2-Naphthol-7-Sulfonate has a molecular formula of C10H7NaO6S and a molecular weight of 269.21 g/mol. It consists of a naphthol ring, which is a fused benzene ring, and a sulfonic acid group attached to the second position of the naphthol ring. The presence of the sulfonic acid group makes the compound highly acidic and water-soluble. The compound is also known for its strong yellow color, which is a result of the conjugated system of the naphthol ring.

Synthesis of Sodium 2-Naphthol-7-Sulfonate

The synthesis of Sodium 2-Naphthol-7-Sulfonate involves several steps. One common method is the sulfonation of 2-naphthol with sulfuric acid. This reaction is typically carried out in an aqueous solution at a temperature of around 40-50°C. The resulting product is then neutralized with sodium hydroxide to form the sodium salt. Another method involves the reaction of 2-naphthol with chlorosulfonic acid, followed by neutralization with sodium hydroxide. The purity of the final product can be achieved through recrystallization from a suitable solvent.

Applications of Sodium 2-Naphthol-7-Sulfonate

Sodium 2-Naphthol-7-Sulfonate finds applications in various industries due to its unique properties. One of the primary uses is in the dye industry, where it serves as a mordant, a substance that fixes dyes onto fibers. It is also used as a pH indicator in analytical chemistry, as it changes color in the presence of certain pH levels. Additionally, it is employed in the pharmaceutical industry as a raw material for the synthesis of certain drugs.

Safety Considerations

Like any chemical compound, Sodium 2-Naphthol-7-Sulfonate has certain safety considerations. It is classified as a hazardous substance due to its potential to cause irritation to the skin, eyes, and respiratory system. Proper handling and storage procedures are essential to minimize the risk of exposure. Workers handling this compound should wear appropriate personal protective equipment, such as gloves, goggles, and lab coats. It is also important to ensure proper ventilation in areas where the compound is used or stored.

Environmental Impact

The environmental impact of Sodium 2-Naphthol-7-Sulfonate is a concern due to its potential to contaminate water sources. The compound is not biodegradable and can persist in the environment for a long time. Therefore, proper waste management and disposal practices are crucial to prevent environmental pollution. It is also important to minimize the release of the compound into the environment during its production and use.

Regulatory Status

Sodium 2-Naphthol-7-Sulfonate is subject to regulatory controls in many countries. These regulations are in place to ensure the safe handling, use, and disposal of the compound. The European Union has classified it as a hazardous substance under the Classification, Labelling, and Packaging (CLP) Regulation. In the United States, it is regulated under the Toxic Substances Control Act (TSCA) and the Occupational Safety and Health Administration (OSHA) standards.

Conclusion

In conclusion, Sodium 2-Naphthol-7-Sulfonate, with the CAS number 135-55-7, is a versatile compound with a wide range of applications. Its chemical properties, synthesis methods, and safety considerations are crucial aspects to understand for anyone involved in its production, use, or disposal. By adhering to proper handling and disposal practices, the environmental impact of this compound can be minimized. This article has provided a comprehensive overview of Sodium 2-Naphthol-7-Sulfonate, covering its chemical properties, synthesis, applications, safety, environmental impact, and regulatory status.

Keywords: Sodium 2-Naphthol-7-Sulfonate, CAS 135-55-7, chemical properties, synthesis, applications, safety, environmental impact, regulatory status.