萘是碳、氢两种元素组成的化合物，不是元素。 其次，它是致癌物，致淋巴瘤、致子宫肿瘤、致肺肿瘤。 另外还具有刺激作用，高浓度致溶血性贫血及肝、肾损害。

Naphthalene is a compound composed of carbon and hydrogen, not an element. Secondly, it is a carcinogen, causing lymphoma, uterine tumor and lung tumor. In addition, it also has stimulating effect, and high concentration can cause hemolytic anemia and liver and kidney damage.

反复接触萘蒸气，可引起头痛、乏力、恶心、呕吐和血液系统损害。可引起白内障、视神经炎和视网膜病变。皮肤接触可引起皮炎。 毒性：属低毒类。

Repeated exposure to naphthalene vapor can cause headache, fatigue, nausea, vomiting and blood system damage. It can cause cataract, optic neuritis and retinopathy. Skin contact can cause dermatitis. Toxicity: low toxicity.

吸入高浓度萘蒸气或粉尘时，出现眼及呼吸道刺激、角膜混浊、头痛、恶心、呕吐、食欲减退、腰痛、尿频、尿中出现蛋白及红白细胞。亦可发生视神经炎和视网膜炎。

When inhaling high concentration naphthalene vapor or dust, there will be eye and respiratory tract irritation, corneal turbidity, headache, nausea, vomiting, anorexia, low back pain, frequent urination, protein and red and white blood cells in urine. Optic neuritis and retinitis can also occur.

工业萘是基础化工原料，主要用于生产减水剂、扩散剂，是生产合成树脂、增塑剂、橡胶防老剂，表面活性剂，合成纤维，染料、医药和香料等的原料。

Industrial naphthalene is a basic chemical raw material, which is mainly used in the production of water reducer and dispersant. It is the raw material for the production of synthetic resin, plasticizer, rubber antioxidant, surfactant, synthetic fiber, dyes, medicine and spices.

根据纯度不同，萘可分为工业萘和精萘，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，且从煤焦油中分离出来的萘称之为焦油萘。

According to different purity, naphthalene can be divided into industrial naphthalene and refined naphthalene. After further purification, impurity removal and desulfurization of industrial naphthalene, high-purity refined naphthalene can be obtained, and naphthalene separated from coal tar is called tar naphthalene.

萘的用途分配，各国有所不同，大致用于生产邻苯二甲酸酐约占70%，染料中间体（如β－萘酚）和橡胶加工助剂约占15%,杀虫剂约占6%,鞣革剂约占4%，染料生产较少的国家,如美国则用于生产杀虫剂的比例较大。

The use distribution of naphthalene varies from country to country. It is roughly used to produce phthalic anhydride, accounting for about 70%, and dye intermediates (such as β－ Naphthol) and rubber processing aids account for about 15%, pesticides account for about 6%, tanning agents account for about 4%. Countries with less dye production, such as the United States, have a large proportion of pesticides.

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