化学名称：硫化钠
俗         称：硫化碱
英文名称：sodium sulphide (alkali sulphide)
分子式：Na2S.xH2O
分子量：78.04
执行标准：GB/T10500-2000

物化性质：纯硫化钠无水物为白色立方形结晶或颗粒。具有极强的吸湿性，空气中易变色，不稳定。相对密度1.856（14摄氏度），熔点1180摄氏度。溶于水（10摄氏度时溶解度为15.4g/100ml水，90摄氏度时溶解度为57.2g/100ml水），溶液呈碱性。微溶于醇，不溶于醚。水溶解呈强碱性，触及皮肤和毛发时会造成灼伤，故又称硫化碱。溶于硫黄生成多硫化钠。硫化钠有腐蚀性，有毒，在空气中易氧化生成硫代硫酸钠。硫化钠在空气中潮解，并碳酸化而变质，不断释出硫化氢气体。工业硫化钠因含有杂质其色泽呈粉红色、棕红色、土黄色块。其比重、溶点、沸点，也因杂质影响而异。

用　      途：

染料工业中用于生产硫化染料，是硫化青和硫化蓝的原料；
印染工业中用作溶解硫化染料的助染剂；
制革工业中用于水解使生皮脱毛，还用以配制多硫化钠以加速干皮浸水助软；
造纸工业中用作纸张的蒸煮剂；
纺织工业中用于人造纤维脱硝和硝化物的还原，以及棉织物染色的媒染剂；
制药工业中用于生产非那西丁等解热药；
此外还可用于制硫代硫酸钠、多硫化钠、硫氢化钠等。

生产方法：（煤粉还原法）硫酸钠在混合器中与煤粉混合后加到转炉内，于高温下进行还原反应，将反应所得粗碱经浸取过滤、蒸发后制片即得。

The English version

Chemical name: sodium sulfide

Common said alcali sulphide

English name: sodium sulphide (alkali sulphide)

Molecular formula: Na2S. XH2O

Molecular weight: 78.04

Execution standard: GB/T10500-2000

Physical and chemical properties: pure sodium sulphide anhydride as white cube crystal or granule. With a strong moisture absorption, easy discoloration, air is not stable. Relative density 1.856 (14 c), melting point 1180 degrees Celsius. Soluble in water (10 degrees c solubility is 15.4 g / 100 ml water, 90 degrees Celsius when the solubility of 57.2 g / 100 ml water, alkaline solution. Slightly soluble in alcohol, insoluble in ether. Water dissolved in strong alkaline, cause burns when touch the skin and hair, so it is also called alcali sulphide. Soluble in sulfur sodium polysulfide is generated. Sodium sulfide corrosive, toxic, liable to oxidation produce sodium thiosulfate in the air. Sodium sulphide deliquesce in the air, and carbonatation and metamorphism, continuously release hydrogen sulfide gas. Industrial sodium sulfide for containing impurities which are pink, red brown, khaki color blocks. Its specific gravity, melting point, boiling point, and also owing to the different impurity effect.

To use:

Dye industry for the production of sulphur dyes, sulphur black and vulcanization of blue raw material;

Used as dissolved sulphur dyes in dyeing and printing industry to help dye;

Used for hydrolysis in leather-making industry make rawhide hair removal, but also to make sodium polysulfide to speed up the dry skin immersed help soft;

Used as paper cooking agent in papermaking industry;

Used in synthetic fiber in textile industry denitration and nitrate reduction, as well as cotton fabric mordant dyeing;

The pharmaceutical industry for the production of phenacetin, antipyretic;

In addition can also be used for making sodium thiosulphate, sodium polysulfide, nahs, etc.

Production methods: (pulverized coal and pulverized coal in the mixer for sodium sulfate reduction method) blend to add to the converter, the reduction reaction under high temperature, the reaction proceeds from coarse alkali after leaching filtering, evaporating the producer for a quick.