Finally, current dyeing applications are summarised. Extraction and purification strategies, as well as analytical methods, are then discussed. It presents an in-depth description of the three main classes of quinoid compounds in terms of their structure, occurrence biogenesis and toxicology. Therefore, this study looks at the potential of isolating and applying quinone dye molecules from a sustainable source as a possible replacement for synthetic dyes. One promising class of alternatives is the natural quinones these are class of cyclic organic compounds characterized by a saturated (C6) ring that contains two oxygen atoms that are bonded to carbonyls and have sufficient conjugation to show color. However, environmental and sustainability considerations have led to an increasing efforts to substitute them with safer and more sustainable equivalents. ![]() Synthetic dyes are by far the most widely applied colourants in industry.
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