Sodium Sulphide (Na2S) – Yellow Flake

Sodium Sulphide (Na2S) – Yellow Flake or “Zirnikh,” composed of the Na2S formula, is a multipurpose substance. This chemical compound is utilized in the manufacture of rubber chemicals, sulfur dyes, and oil recovery, as well as in the pulp and paper industry, and several chemical manufacturing processes. Given this information, we understand the inseparable role of this substance in diverse sectors. So, the desire for a flawless sodium sulphide manufacturer, supplier, and exporter is undeniable.

Using Iran sodium sulphide in this situation makes sense to favor of its professional chemical exporters. Numerous sodium sulphide suppliers are available in this country that produce high-quality products. JAM Group Co. stands out among the leading sodium sulphide manufacturers in the area. Costumers from the middle east or other regions worldwide can rely on a flawless supply chain represented by this sodium sulphide supplier. So, please keep in touch with our experts about all you ache to know, from the Sulfidization process to confusing issues about Na2S.


What is Sodium Sulphide?

The Turkish term, Zirnikh, or more famous ones like Sodium Sulphide and Sodium Sulfide, all refer to the same chemical product. It is essential to understand that The chemical compound with the formula Na2S, or more often its hydrate Na2S9H2O, is the sodium sulfide we are discussing. The salts are both colorless solids when it comes to hydrated and anhydrous. They dissolve in water and produce extremely alkaline solutions. Good to know that Hydrogen sulfide, a highly toxic, explosive, and corrosive gas with the odor of rotten eggs, is released when Na2S and its hydrates are exposed to damp air.

Zirnikh, like sodium hydrogen sulfide (NaSH) is a product based on sodium sulfate with distinct balances in its ingredients. It is made by reducing sodium sulfate with coal, lignite, natural gas, hydrogen, or other reductants at temperatures above 950°C in relatively straightforward fusion furnaces. The reaction conditions must be carefully managed to obtain an essentially pure product, reduce the amount of unreacted sodium sulfate, and prevent the creation of additional sulfur and carbonate compounds. Depending on the product, it is either dissolved and then further refined or pulled off as a melt, hardened, and sold as-is. The tanning sector, where high purity is not necessary, makes use of a crude sodium sulfate raw material, which is where it finds its most significant application.


Different Grades of Sodium Sulphide

It is vital to have a general understanding of sodium sulfide grades and subtypes before discussing processes such as sulphidisation and sulfidization. Remember, The majority of laboratory chemicals are labeled with a grade, which typically denotes the chemical’s purity. Although there are numerous standards used in grading, you are most likely to come across the ACS, Reagent Grade, and Laboratory Grades. Everyone in the custody supply chain should recognize and understand the different classes of chemicals and their uses provided by sodium sulphide suppliers. When manufacturing a solution, the maker must first assess what degree of chemical purity is needed based on the intended usage.

Keep in mind that Zirnikh, based on its firmness, is divided into two general categories: liquid and solid. There are also other grades of this product with different sodium levels; for instance, some qualities contain up to 60% Na2S while others hold less than 30 percent.

Liquid Sodium sulphide

Mineral processing and manufacturing of Zirnikh do not always result in a stable shape of this chemical product. It is essential to know that Sodium sulfide (Na2S) cubic crystals are highly hygroscopic by nature and turn brown when exposed to air. Na2S is not soluble in ether but water and alcohol to a lesser extent. Na2S aqueous solutions have a high alkaline pH.

Solid Sodium Sulphide

As previously mentioned, solid sodium sulfide grade is a yellow to brick red crystalline mass, fused flake substance with a stench of rotten eggs. It is susceptible to spontaneous heating when exposed to damp air, which could set off neighboring combustible materials. It takes in moisture from the atmosphere. Keep in mind that chemical suppliers refer to this grade as a richer source of sodium than the liquid ones which is used in particular industries.


Sodium Sulfide Production Process

Chemical procedures such as Floatation or, more specifically, sodium sulphide floatation should be accomplished under the eye of experienced chemists to best results come to the hand. In every case, sodium sulfate is reduced to form sodium sulfide. This reduction is often made using carbon, but it can also be done with hydrogen and other reducing gases.

In addition to sodium sulfide, a crude melt produced by reduction with carbon also contains significant amounts of other impurities and byproducts, including unreacted carbon, ash components, pollutants from the carbon, carbonates, sulphites, sodium thiosulfates, and iron compounds. The water-soluble portion of the contaminants and significant levels of iron passes into the extraction fluid when this crude melt is typically extracted with water. The aqueous solution then undergoes further reactions, which produce unwanted byproducts.

Either Na S.9H O crystals are produced by evaporating the extraction fluid, or a product with a 60 percent Na S content solidifies from the melt with further evaporation. Both hydrates, specifically those that form crystals from the solution and contain 32 percent sodium sulfate, are rich in soda, sulfite, thiosulfate, sulfate, and iron ions. The commercially available product that contains 60% sodium is stained a dark reddish-brown by the iron and can hardly be utilized for several applications, like treating textiles. Due to the extraordinarily steep rise in melt temperature above 60 percent of Na-S and the lack of a suitable material to use in the construction of the critical apparatus that is resistant to concentrated sodium sulphite melt. it is neither technically feasible nor economically feasible to evaporate further away from the remaining 40 percent of water content.

All in all, it is essential to review several modern methods that are applied after the Mineral processing chemical substances undergo. By reducing sodium sulfate with carbon or other reducing agents, it is now possible to create a sodium sulfide that is exceptionally pure and free of water and iron in particular. The method is based on the fact that anhydrous sodium sulfide dissolves well in alcohols, unlike the hydrate.

The Reduction based on Carbon

Some Chemical Manufacturers utilize cutting-edge methods for producing Zirnikh that need brand-new tools and high-quality equipment.

A step in a method for making pure, iron-free anhydrous sodium sulfide includes heating a melt of sodium sulfate and carbon that contains impurities from the reduction process with alcohol, filtering the resulting sodium sulfide solution, and then recovering the sodium sulfide from the said solution by evaporating the alcohol. hydrogen sulfide (H2S) and sodium hydroxide can react to yield sodium sulfide (Na2S), which can then be converted to sodium hydrosulfide (NaHS); so, it has been suggested that Na2S-NaHS liquor can be gassed with pure H2S to produce sodium hydrosulfide.

Commercial caustic soda, which contains significant amounts of impurities such as iron, copper, nickel, manganese, and silicon, is the source of sodium in operations of the kind to which the invention applies. Since these impurities do not significantly alter the color of caustic soda, their presence in commercial acidic is not disagreeable. These contaminants, however, pass through the process and are incorporated into the final NaHS liquor when retail caustic liquor is H2S gassed. These impurities may exist as soluble salts or be suspended in a finely divided state in the NaHS liquid.

Because of the highly colored character of the impurities after being treated to H2S gassing, the presence of even small concentrations of these impurities in Na2S or NaHS solutions results in very poor-looking products. The removal of such contaminants has therefore been a significant issue in the production of relatively pure sodium hydrosulfide. The substance produced by this technique, generalized under the name of Leather chemicals, has a role across many stages of the leather production process, including tanning, dying, and retaining.

Zirnikh Production From Hydrosulfide Liquor

To produce purified sodium sulfide from sodium hydrosulfide liquor, two sides must be considered:

  • At least one metallic impurity from the group composed of silicon, manganese, copper, nickel, and iron;
  • More than 0.06 percent of the weight of the CO3 radical is included in the accessible sodium carbonate, which is obtained by treating the alcohol with an alkaline earth chemical, which causes the combined CO3 from the reaction to precipitate as alkaline earth carbonate.

Remember that the chemical compound’s portion must be adequate to lower the amount of sodium carbonate available in the alcoholic liquid to a level corresponding to no more than 0.06 percent CO3 by weight. It regulates the liquor’s composition to ensure that sodium sulfide makes up no more than 5% of the total weight of the finished product. It also affects the coagulation and precipitation of metallic impurities from the finished product.


Sodium Sulphide Applications

Due to its diverse functions, sodium sulfide is involved in various industries. This chemical compound is distinguished by its roles, sometimes as a hair removal agent and another time as a crucial material for the paper business. Please bear in mind the more you get familiar with the products’ various roles like Sodium sulphide leather, the more you can manage to use this chemical substance in your industry correctly.

Below, you will discover the top companies in demand in Zirnikh and a chemical manufacturer with high-quality products like JAM Group Sodium Sulphide. For instance, the use of sodium sulfur in the pulp and paper industry is significant. In the kraft process, experts in this field employ it in pulp and paper production enterprises.

Leather tannery industry

First, we should have a general understanding of this business to learn the inseparable part of Zirnikh from it. Ordering hides is how tanneries start the production of leather. These have a flat surface area of roughly 50 square feet and can weigh over 90 pounds. The coat will likely have some flaws, but it will still resemble a cow in shape. Before tanning, the hide’s hair will need to be chemically removed. The leather could go through further procedures to clean out impurities and soften the skin so the tanning agents can penetrate the skin thoroughly.

In the first stage, the hair on the hides or skins is chemically destroyed using sodium sulfide. Salt sulfur will help soften tough leather. Iron concentration should be under 30PPM, and yellow Sodium sulphide flakes should be 60% of the total. Take into consideration that the ideal option for the tanning business is sodium sulphide (Na2S) with low iron concentration because tanning wastewater is particularly bad for human health.

Mining process

Sodium sulfide has an influential role in the mining industry too. The process of ore flotation in mining businesses is one of the other primary uses for this chemical compound. In the flotation of zinc, copper, iron, and other metal ores, they utilize Na2S (sulfur sodium), sometimes known as sodium-sulfur.

Water treatment procedures

Additionally, professionals employ Na2S to precipitate heavy metals from wastewater at a neutral or alkaline ph. During this process, hexavalent chromium is reduced to trivalent chromium and precipitated by the combined action of sulfuric and ferrous ions.


Iran sodium sulphide works well as a reducing agent as well. First, we should know that salt makes absorption easier. The dye is then renewed by oxidation after the fabric has been removed from the dye solution and left to stand in the air.


About JAM Group’s Sodium Sulphide

A large variety of companies are involved in the Zirnikh industry, so why should we choose the JAM Group among them? There are various reasons for considering this organization as a reliable business partner. The sodium sulfide that JAM Group produces enjoys unique qualities. This product is well-shaped, with transparent yellow color and neat sides. It is a perfect option for employment in Flotation, mining industries, and leather business. Remember that this company is capable of producing sodium sulfide by less than ten ppm iron and 60% activity.

It is also worth mentioning that you have different logistics options when dealing with JAM Group Co. Sodium sulfide is packed under universal standards in secure packings. Still, you can ask for particular filling methods that suits your desire. For instance, you can have your product in jumbo bags and customize the quantity of every single pakage; Jambo bags contain around 1 ton of Zirnikh, but the customer can reduce it even to 800 kilograms. To find out more about this company and its offerings, please navigate to About Us.



Sodium Sulphide is a chemical product with the formulation of Na2S; This substance is utilized in two different grades: liquid and solid. Every quality of this product is used in various industries, but all in all, the solid one is a more substantial option. There are diverse ways of producing sodium sulphide, like employing carbon or Hydrosulfide Liquor. Some of these methods are old-fashioned, but others are provided by cutting-edge technologies that make better chemical compounds. Sodium Sulfide entails multifold usage; It is employed in numerous businesses such as mineral processing, leather tanning and water treatment procedures.