Sodium Sulphide NaS
Sodium sulphide is a yellow to red crystalline solid that is highly watersoluble and has a strong rotten egg smell due to the release of hydrogen sulfide HS gas It is commonly used in tanneries chemical industries and water treatment
Key Properties of Sodium Sulphide
Strong reducing agent Reacts with oxidizing substances
Highly soluble in water Forms an alkaline solution
Releases hydrogen sulfide HS Has a pungent rotten egg smell
Corrosive reactive Can react violently with acids
Common Uses of Sodium Sulphide
1 Leather Textile Industry
Used in leather tanning to remove hair from animal hides
Helps in dyeing and textile processing as a reducing agent
2 Pulp Paper Industry
Used in the kraft process to break down wood pulp fibers
Helps in removing lignin from wood to make paper
3 Water Treatment Metal Processing
Used to remove heavy metals eg mercury lead from industrial wastewater
Helps in metal surface treatment and ore flotation in mining
4 Chemical Pharmaceutical Industry
Used in manufacturing sulfurbased chemicals like dyes and rubber chemicals
Used in some pharmaceutical synthesis processes
5 Photography Film Development
Previously used in film processing as a reducing agent
Is Sodium Sulphide Safe
Highly corrosive Can cause severe burns if it contacts the skin
Releases toxic hydrogen sulfide HS gas Dangerous in confined spaces
Can react violently with acids producing harmful fumes
Must be handled with gloves goggles and in wellventilated areas
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