Naphthalene, a seemingly simple white crystalline solid with the CAS number 91-20-3, plays a surprisingly significant role in modern industry. Its distinctive aroma, reminiscent of mothballs, belies its importance as a fundamental building block in a vast array of chemical syntheses. Often sourced from coal tar, naphthalene’s transformation into a key industrial intermediate is a testament to chemical engineering and innovation. Understanding the applications and properties of this compound is crucial for anyone involved in chemical manufacturing, particularly in sectors like dyestuffs, pharmaceuticals, and plastics.

The primary industrial application of naphthalene lies in its role as a precursor to phthalic anhydride. While phthalic anhydride can also be derived from o-xylene, naphthalene remains a significant feedstock. Phthalic anhydride itself is a critical intermediate used in the production of plasticizers for PVC, polyester resins, and alkyd resins found in paints and coatings. This chain of production highlights naphthalene's foundational importance in the manufacturing of everyday materials.

Beyond plasticizers, naphthalene is indispensable in the synthesis of dyestuffs. It serves as a precursor for compounds like 2-naphthol and various naphthylamines, which are essential in creating a wide spectrum of dyes used in the textile, printing, and paint industries. The demand for vibrant and durable colors in consumer goods directly fuels the need for high-quality naphthalene as a dyestuff intermediate. For manufacturers seeking to buy naphthalene for these purposes, ensuring high purity is paramount.

The pharmaceutical industry also heavily relies on naphthalene. It functions as a crucial intermediate in the synthesis of various active pharmaceutical ingredients (APIs). For instance, it is used in the production of certain beta-blocking agents and other medicinal compounds. The rigorous quality standards of the pharmaceutical sector mean that pharmaceutical grade naphthalene must meet stringent purity and specification requirements, making reliable suppliers in China particularly valuable.

Furthermore, naphthalene finds application in the agrochemical sector. It is used in the production of certain insecticides and surfactants, contributing to the development of effective crop protection solutions and industrial cleaning agents. Its role as a surfactant enhancer in wettable powder formulations for agricultural chemicals demonstrates its versatility in modifying chemical properties for specific uses.

The physical properties of refined naphthalene are well-defined. Typically presenting as white powdery crystals or flakes, it has a melting point around 80-82°C and a boiling point of approximately 218°C. Its purity is often specified at 99% or higher. Commonly supplied in packaging ranging from grams to kilograms in foil bags or larger fiber drums, it is handled with care due to its flammability and potential health hazards, necessitating adherence to safety guidelines when purchasing and using this chemical.

In summary, refined naphthalene (CAS 91-20-3) is far more than just a chemical compound; it is a vital link in numerous industrial value chains. From vibrant dyes to life-saving medicines and essential industrial materials, its role as a chemical intermediate underscores its enduring significance. NINGBO INNO PHARMCHEM CO.,LTD is committed to supplying this critical material, ensuring quality and reliability for all your manufacturing needs.