sulphopurpuric, a. Chem.
(ˌsʌlfəʊpɜːˈpjʊərɪk)
[ad. F. sulfo-purpurique (Dumas, 1836): see sulpho- and purpuric.]
Applied to an acid obtained by the action of sulphuric acid on indigo. Hence sulphoˈpurpurate.
| 1838 T. Thomson Chem. Org. Bodies 378. 1857 Miller Elem. Chem., Org. viii. 531 Sulphopurpuric Acid..forms a blue solution in pure water. When acetate of potash is added to this liquid it gives a purple precipitate of sulphopurpurate of potash. 1881 Encycl. Brit. XII. 844/1. |