alizarin СУЩ.
- alizarin
- alizaryna ж.
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The process of staining calcium with alizarin works best when conducted in basic solution.
en.wikipedia.org Alizarin's abilities as a biological stain were first noted in 1567, when it was observed that when fed to animals, it stained their teeth and bones red.
en.wikipedia.org In addition, easy access to synthetic dyes has mean that natural indigo and alizarin have been replaced by chemical complements which are then passed off as natural dyes.
thewire.in Alizarin is a red dye with considerable commercial usage.
en.wikipedia.org The synthesis is a chlorination or bromination of anthracene with a subsequent oxidation forming the alizarin.
en.wikipedia.org