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| a purplish-red, water-soluble powder, C20H11N2O10Na3, an azo dye used chiefly to color pharmaceuticals, food, and garments |
| a substance that, because of the reactions it causes, is used in analysis and synthesis |
aldol al·dol (āl'dôl, -dōl)
n.
A thick, colorless to pale yellow liquid obtained from acetaldehyde and used in perfumery and as a solvent.
A similar aldehyde containing the group CH3OH-CO-CHOH.