auxochrome

chemistry

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In dye: Dye structure and colour
…₂, ―OH), which he named auxochromes. These ideas remain valid, although they have been broadened by better recognition of the role of specific structural features. He had also claimed that auxochromes impart dyeing properties to these compounds, but it later became clear that colour and dyeing properties are not directly…
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In colour: Organic compounds
…groups of atoms known as auxochromes. Auxochromes can be either electron acceptors or electron donors. Nitrophenylenediamine compounds contain both types of auxochromes. They absorb in the blue part of the spectrum and are often used in hair dyes because the small size of the molecules allows them to penetrate into…
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