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These are deep brown coloured Carbon compounds, which are commercially very useful.......
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Resins
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Gums
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Tannins
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Alkaloids
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Tannins are deep brown coloured carbon compounds that have significant commercial value. They are commonly found in plants and have various applications such as in the production of leather, dyes, and adhesives. Tannins are also used in the manufacturing of wines and in the preservation of wood. Due to their unique properties and versatility, tannins are highly sought after in various industries, making them commercially valuable.