化学式NaOH，通常被称为烧碱、火碱、苛性钠，是一种强碱，通常是片状或块状形状，具有强腐蚀性。易溶于水(溶于水时放热)并构成碱性溶液，另具潮解性，易于从空气中吸收水蒸气(潮解)和二氧化碳(蜕变)，可以参与盐酸检验是否变质。
Chemical formula NaOH, commonly known as caustic soda, caustic soda and caustic soda, is a strong alkali, usually in sheet or block shape, with strong corrosivity. It is easily soluble in water (exothermic when dissolved in water) and forms an alkaline solution. In addition, it has deliquescence and is easy to absorb water vapor (deliquescence) and carbon dioxide (metamorphosis) from the air. It can participate in the hydrochloric acid test for deterioration.
NaOH在化学实验室中是必不可少的化学物质，也是一种常用化学物质。纯物质为无色，结晶。浓度为2.130g/cm3。熔点318.4℃。沸腾温度1390℃。工业产品含有少量的氯化钠和碳酸钠，为白色结晶。具有块、片、粒、棒等的块状。
NaOH is not only an essential chemical in chemical laboratory, but also a common chemical. Pure substances are colorless and crystalline. The concentration is 2.130g/cm3. Melting point 318.4 ℃. Boiling temperature 1390 ℃. Industrial products contain a small amount of sodium chloride and sodium carbonate, which are white crystals. A block with blocks, pieces, grains, rods, etc.

在水处理中，氢氧化钠可作碱性清洗剂，溶于乙醇、甘油，不溶于丙醇、醚类。和氯，溴，碘等卤素发生歧化反应。和酸起中和作用，产生盐和水。
In water treatment, sodium hydroxide can be used as alkaline cleaning agent, soluble in ethanol and glycerol, insoluble in propanol and ether. Disproportionation reaction with halogen such as chlorine, bromine and iodine. Neutralize with acid to produce salt and water.
氢氧化钠(NaOH)是非常有用的。适用于生产纸张、番、染料、人造丝、磨砂、石油精制、棉织物整理、食品加工、木材加工和机械行业等。
Sodium hydroxide (NaOH) is very useful. It is suitable for the production of paper, saffron, dyes, rayon, frosting, petroleum refining, cotton fabric finishing, food processing, wood processing and machinery industries.
在国民经济中，氢氧化钠的用途十分广泛，许多工业部门需要它。使用氢氧化钠的主要成分是化工生产，其次是造纸、炼铝、炼钨、人造丝、人造棉、石棉等工业。生产染料、塑料、药剂、有机中间体、旧橡胶的再生、金属钠、水的电解和无机盐的生产，也要大量使用烧碱，硼砂、铬盐、锰酸盐、磷酸盐等。一种起用氢氧化钠，超吸收性聚合物，沸石，环氧树脂，磷酸钠，亚硫酸钠和许多钠盐的原料之一。
In the national economy, sodium hydroxide is widely used, and many industrial departments need it. The main component of sodium hydroxide is chemical production, followed by papermaking, aluminum smelting, tungsten smelting, rayon, artificial cotton, asbestos and other industries. In the production of dyes, plastics, pharmaceuticals, organic intermediates, the regeneration of old rubber, the electrolysis of metal sodium and water and the production of inorganic salts, it is also necessary to use caustic soda, borax, chromium salt, manganate, phosphate, etc. The utility model relates to one of the raw materials for using sodium hydroxide, super absorbent polymer, zeolite, epoxy resin, sodium phosphate, sodium sulfite and many sodium salts.
人工纤维如人造棉、人造毛、人造丝等，大多是粘胶纤维，它们是以纤维素、氢氧化钠、二硫化碳(CS2)为原料，经喷丝制得粘胶。
Artificial fibers such as artificial cotton, artificial wool and rayon are mostly viscose fibers. They are made of cellulose, sodium hydroxide and carbon disulfide (CS2) through silk spraying.
用氢氧化钠对纤维进行处理、染色，并将其应用于棉纤维的丝光处理。经烧碱液处理的棉织品，可除去棉织品上覆蜡、油脂、淀粉等物质，共同提高了织物的丝光色，使染色更加均匀。
The fiber was treated and dyed with sodium hydroxide and applied to the mercerization of cotton fiber. The cotton fabric treated with caustic soda solution can remove the wax, grease, starch and other substances on the cotton fabric, jointly improve the mercerization color of the fabric and make the dyeing more uniform.