sodium sulfide (sodium sulfide Technology) is a compound which is widely used in industry.Thus, this substance is applied metallurgy, chemical, light, and other industries.Sodium sulfide, are particularly useful in the production of cellulose, the dyes, in the processing of leather.Suitable melting substance in a number of non-ferrous metals.Sodium sulfide is indispensable in the field of analytical chemistry.It is used as a reagent in various processes.
sodium sulfide.Formula (Na2S)
normal physical state of matter is considered to be a homogeneous mass, characterized by high sensitivity, or hygroscopic crystals.The substance produced in the form of a monolith 3 values in particulate form (in the form of flakes or granules).Use may be a product having a light brown, pale yellow or grayish color.More intense or any other color indicates significant oxidation agent.Such sodium sulfide and loses useful properties unsuitable for practical use.The product contains the technical purpose of the sixty-three to sixty-seven percent of the base material under the condition that the mass fraction of insoluble residue of not more than half a percent.
In accordance with the classification of the level of danger to the human sodium sulphide assigned to the second class.The substance is combustible and explosive.In this regard, it is preferable to store the material in enclosed spaces that are equipped with all facilities needed to ensure fire safety.It is not recommended to remove the product from the packaging until ready to use substances.When you save a sealed container sodium sulfide can be stored up to two years.Term of effective use in this case is only a year.
transport of the product should be carried out by any means of transport in closed wagons or containers.Great attention should be paid to the loading and unloading of material, especially if expected to direct contact with a product packed in flexible containers.During transport to avoid temporary storage in open areas or warehouses, poorly equipped for this.
sodium sulphide technical Chinese production is packed in special bags for twenty-five kilograms.Packaging provides protection from premature oxidation and exposure to light.Furthermore, as a packaging steel drums are used exclusively for chemical products, the containers (CK-1-5 (7)), or as soft containers for single use.The substance may be packaged in paper bags (four- or five-layer) with inner liner - plastic bag.Bags may be not a net weight of more than fifty kilograms.
packed in special containers are transported in open rolling stock type.
Product density of 1.856 grams per cubic centimeter.Melting temperature reaches 1180 degrees.Product is highly hygroscopic.In water at twenty degrees dissolved 13.6% at 97.5 degrees - 45% of the material.The product is capable of forming crystalline hydrates.For aqueous solutions of sodium sulfide technical characteristic of alkaline reaction.
Hydrolysis of sodium sulphide is carried out as well as salts which are formed a weak acid and a strong base.In vitro with phenolphthalein becomes pink solution.This demonstrates that the in vitro formed alkaline environment.Thus, sodium sulfide, as well as other salts that form a weak acid and a strong base is hydrolyzed to form a resulting alkali.
