This word is derived from a Greek
word auxanein means to increase/intensify and chroma means color. So, the
groups which intensify the color is called auxochrome. It also increases the
affinity for textile fibers.
Example:
1.
Hydroxyl group (-OH).
2.
Amino group (-NH2).
3.
Methyl group (-NH-CH3).
4.
Nitrate group (-NO3) etc.
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