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• Sodium sulphide is the name used to refer to the chemical compound Na₂S but more commonly its hydrate  Na₂S^.9H₂O. Both are a colorless water-soluble salts that give strongly alkaline solutions.
• Sodium Sulfide is a yellow to red solid, readily soluble in water, slightly soluble in alcohol. It is a strong reducing agent and reacts with oxidants.

Technology

• The enzymatic treatment of hides and skins can be considered as a cleaner technology only if the amount of sodium sulphide is reduced substantially. However it is not yet possible to use less than 1% of  sodium sulphide for bovine hides.

• Sodium Sulfide Pre-treatment Increases the Rate and Sensitivity of Silver Precipitation onto DAB. While looking for ways to maximize the sensitivity of the silver enhancement, we observed that pre-treatment of the DAB with sodium sulfide was very effective for this purpose

Application

• Sodium Sulphide is primarily used in pulp and paper industry.

• It is used in water treatment as an oxygen scavenger agent, in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurizing and as a dechlorinating agent and in leather trade for the sulfitization of tanning extracts.

• It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds.

• It is use in other applications include ore flotation, oil recovery, food preservative, making dyes, and detergent.

• The most extensive use is in the deplilation of hides for leather before tanning, in wood pulp processing and desulfuration of rayon and cellophane.

Report

• During our religious holiday of sacrifice, a leakage was detected on the retaining wall of sodium sulphide pool towards the dry irrigation water channel, which is located along the border of the plant.

• The oral ingestion of alkali sulphides has been reported to cause nausea, vomiting and epigastric pain, as well as irritate the mucous membranes; it has been estimated that an oral dose of 10 to 15 g sodium sulphide would be fatal to humans.

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