萘,又称并萘,是一种无色有光泽的片状结晶。不溶于水,易升华,能随水蒸气挥发,有特殊气味。是工业上重要的稠环芳烃,可用于生产苯酐、染料的中间体、橡胶助剂和杀虫剂。

　　Naphthalene, also known as naphthalene, is a colorless and glossy plate-like crystal. Insoluble in water, easily sublimates, can evaporate with water vapor, and has a special odor. It is an important polycyclic aromatic hydrocarbon in industry, which can be used as an intermediate in the production of phthalic anhydride, dyes, rubber additives, and insecticides.

　　根据纯度不同,萘可分为工业萘和精萘。工业萘的纯度一般约为96%。工业萘进一步提纯脱除杂质及脱硫后,可得到高纯度的精萘。精蔡的纯度约为99.5%。

　　According to different purities, naphthalene can be divided into industrial naphthalene and refined naphthalene. The purity of industrial naphthalene is generally about 96%. After further purification and desulfurization of industrial naphthalene, high-purity refined naphthalene can be obtained. The purity of Jingcai is about 99.5%.

　　精萘：英文名为Refined naphthalene,分子式为:C10H8,分子量为:128.16,CAS号:91-20-3,外观:为白色易挥发晶体,有温和芳香气味,粗萘有煤焦油臭味;蒸汽压 0.13kPa/52.6℃ 闪点:80℃;熔点 80.1℃ 沸点217.9℃;不溶于水,溶于无水乙醇、醚、苯,相对密度(水=1)1.16;相对密度(空气=1)4.42;稳定性:稳定;主要用途:用于制造染料中间体、皮革、木材保护剂等。

　　Refined naphthalene: English name: Refined naphthalene, molecular formula: C10H8, molecular weight: 128.16, CAS number: 91-20-3, appearance: white volatile crystals, mild aromatic odor, crude naphthalene has a coal tar odor; Steam pressure 0.13kPa/52.6 ℃ Flash point: 80 ℃; Melting point 80.1 ℃ Boiling point 217.9 ℃; Insoluble in water, soluble in anhydrous ethanol, ether, and benzene, with a relative density (water=1) of 1.16; Relative density (air=1) 4.42; Stability: Stable; Main use: Used for manufacturing dye intermediates, leather, wood protectants, etc.

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