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Aluminium hydroxide is used in the dyeing industry as a

Chemistry
JAMB 2004

Aluminium hydroxide is used in the dyeing industry as a

  • A. Salt
  • B. Dye
  • C. Mordant
  • D. Dispersant
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Correct Answer: Option C
Explanation

Aluminum hydroxide is used in the dyeing industry as a mordant. A mordant is a substance that helps dyes stick to fabrics by forming a complex with the dye that attaches to the fabric. 

In dyeing, salt's primary function is to enhance dye absorption and fixation, while a mordant's role is to create a chemical bond between the dye and the fiber, improving colourfastness and potentially altering the final shade. Salts often act as a dyeing promoter, increasing dye exhaustion from the dye bath. Mordants, on the other hand, are typically metallic salts or other substances that form a stable complex with both the dye and the fiber, ensuring the color remains vibrant and stable. 

There is an explanation video available below.


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Explanation Video

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