精萘是一種重要的有機化工原料，具有廣泛的用途，主要包括以下幾個方面：

Naphthalene is an important organic chemical raw material with a wide range of applications, mainly including the following aspects:

生產染料：精萘是合成多種染料中間體的關鍵原料。例如，通過一系列化學反應，可將精萘轉化為 2 - 萘酚、1 - 萘胺等中間體，這些中間體進一步用于生產酸性染料、堿性染料、直接染料、活性染料等各類染料，廣泛應用于紡織、皮革等行業的染色工藝。

Production of dyes: Naphthalene is a key raw material for synthesizing various dye intermediates. For example, through a series of chemical reactions, refined naphthalene can be converted into intermediates such as 2-naphthol and 1-naphthylamine. These intermediates are further used to produce various dyes such as acid dyes, alkaline dyes, direct dyes, and reactive dyes, which are widely used in dyeing processes in industries such as textiles and leather.

制造塑料：精萘可用于制備塑料增塑劑和聚苯乙烯樹脂。在塑料生產中，增塑劑能夠提高塑料的柔韌性和可塑性，而聚苯乙烯樹脂是一種常見的熱塑性塑料，具有良好的透明性、絕緣性和加工性能，被廣泛應用于包裝、電子、建筑等領域。

Manufacturing plastics: Refined naphthalene can be used to prepare plastic plasticizers and polystyrene resins. In plastic production, plasticizers can improve the flexibility and plasticity of plastics, and polystyrene resin is a common thermoplastic with good transparency, insulation, and processing properties, widely used in packaging, electronics, construction, and other fields.

合成纖維：精萘是合成聚萘二甲酸乙二醇酯（PEN）纖維的重要原料。PEN 纖維具有優異的力學性能、耐熱性、耐化學腐蝕性和氣體阻隔性，可用于制造高性能纖維材料，如航空航天、汽車工業中的增強材料，以及高端服裝的面料等。

Synthetic fiber: Refined naphthalene is an important raw material for synthesizing polyethylene naphthalate (PEN) fibers. PEN fiber has excellent mechanical properties, heat resistance, chemical corrosion resistance, and gas barrier properties, and can be used to manufacture high-performance fiber materials, such as reinforcement materials in aerospace and automotive industries, as well as fabrics for high-end clothing.

制作醫藥中間體：精萘可以合成一些醫藥中間體，進而用于生產藥物。例如，某些含有萘環結構的化合物具有抗菌、抗炎、解熱鎮痛等藥理活性，是合成相關藥物的重要基礎。

Production of pharmaceutical intermediates: Refined naphthalene can be used to synthesize some pharmaceutical intermediates, which can then be used in the production of drugs. For example, certain compounds containing naphthalene ring structures have pharmacological activities such as antibacterial, anti-inflammatory, antipyretic, and analgesic properties, which are important foundations for the synthesis of related drugs.

用于農藥生產：精萘可作為原料合成一些農藥，如萘乙酸等植物生長調節劑。萘乙酸能促進植物生根、發芽，提高農作物的產量和品質，在農業生產中具有重要作用。

Used for pesticide production: Refined naphthalene can be used as a raw material to synthesize some pesticides, such as plant growth regulators like naphthylacetic acid. Naphthalene acetic acid can promote plant rooting and germination, improve crop yield and quality, and play an important role in agricultural production.

其他應用：精萘還可用于生產表面活性劑、橡膠防老劑、香料等化工產品。此外，精萘具有一定的揮發性和特殊氣味，過去也常被用作衛生球的原料，用于驅蟲防蛀，但由于其毒性，現在已逐漸被其他更安全的替代品所取代。

Other applications: Refined naphthalene can also be used in the production of chemical products such as surfactants, rubber anti-aging agents, and fragrances. In addition, refined naphthalene has a certain degree of volatility and special odor, and was often used as a raw material for sanitary balls in the past for insect and moth control. However, due to its toxicity, it has gradually been replaced by other safer alternatives.

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