Question:

Which chemical is used to remove hair from the skin?

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Sodium sulfide is widely used in leather processing for unhairing, as it breaks down keratin, allowing for the removal of hair from hides.
Updated On: Feb 27, 2025
  • Calcium hydroxide
  • Sodium Sulfide
  • Hydrogen sulfide
  • Calcium carbonate
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The Correct Option is B

Solution and Explanation

In leather processing, the unhairing process involves the use of chemicals that break down the proteins in hair follicles. Sodium sulfide is the primary chemical used for this process, as it efficiently breaks down keratin, the protein in hair, making it easier to remove. Step 1: Role of Sodium Sulfide
- Sodium sulfide is an effective reagent in breaking down the keratin in hair, helping to loosen the hair from the hide.
- Other chemicals like calcium hydroxide and hydrogen sulfide are not commonly used for hair removal, while calcium carbonate is generally used for pH regulation, not unhairing.

Step 2: Conclusion

Therefore, the correct chemical for hair removal is Sodium Sulfide (Option B).
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