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| a purplish-red, water-soluble powder, C20H11N2O10Na3, an azo dye used chiefly to color pharmaceuticals, food, and garments |
| to restore or reduce to the natural or uncombined state, such as a metal |
| end point | |
| —n | |
| 1. | chem the point at which a titration is complete, usually marked by a change in colour of an indicator |
| 2. | the point at which anything is complete |