Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Quinizarin-2-carboxylic acid

The dried root was also found to contain purpuroxanthin (II) formed by separation of CO2. from munjistin (VII). Pseudopurpurin (XXIII) is probably decarboxylated with formation of purpurin (XXI) when the madder root is dried. The dried madder root also contains the following hydroxyanthraquinone dyes in small amounts nordamna-canthal (VI), quinizarin (IX), 1,4-dihydroxy-2-hydroxymethylanthra-quinone (XI), quinizarin-2-carboxylic acid (XII), anthragallol (XVIII), and anthragallol-3-methyl ether (XX) (32, 34, 39). [Pg.193]

A-Dihydroxy-2-hydroxy-methylanthraquinone (XI) Quinizarin-2-carboxylic acid (XII)... [Pg.196]

Quinizarin-2-carboxylic acid (2-Carboxy-l,4-dihydroxyanthraquinone) Structure Ri = R4 = OH, R2 = COOH, R3 = H Isolation [110]... [Pg.664]

XII Quinizarin-2-car-boxylic acid — 1,A-Dihydroxyanthraquinone-2-carboxylic acid... [Pg.191]

See other pages where Quinizarin-2-carboxylic acid is mentioned: [Pg.658]    [Pg.658]   
See also in sourсe #XX -- [ Pg.26 , Pg.664 ]

See also in sourсe #XX -- [ Pg.664 ]



SEARCH



Quinizarin

Quinizarine

© 2024 chempedia.info