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alizarin

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alizarin

Derivative from anthraquinone. It is now prepared synthetically from anthracene. Alizarin crystallizes in dark red prisms and sublimes in orange-coloured needles, melting at 290°C/554°F. It is almost insoluble in water, but dissolves in alcohol.

It yields with metallic oxides magnificently coloured insoluble compounds called ‘lakes’, to which it owes its great value for dyeing purposes. Ferric oxide with alizarin gives a violet-black compound, chromium oxide a claret, calcium oxide a blue, and aluminium and tin give different shades of red.
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That night was a drapery of colors, prussian blues, thalo green, manganese, peppered with a rose madder that somehow deepened into a rich spray of alizarin crimsons, cadmium reds and flashes of cobalt.
Artistic creativity, form, and fictional experimentation in Filipina ... by Grice, Helena / MELUS
Classical organic pigments with lower fastness properties than the high-performance types include 2B Red, pyrazolone reds and oranges, diarylide yellow, Red Lake C, alizarin maroon and lithol rubine.
Colorants: product lines reviewed by Plastics Technology
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