单词 | gallein |
释义 | galleinn. A brown-red powder, or small green crystals, obtained by heating pyrogallol and phthalic anhydride. Used as a dye. ΚΠ 1871 Jrnl. Chem. Soc. 9 700 Gallein is decomposed by heat like hæmatein, carbonisation taking place. 1885 in New Sydenham Soc. Lexicon 1953 H. W. Grimmel in H. Gilman Org. Chem. III. iv. 317 This dye [sc. Coerulein] is obtained from Gallein by treatment with concentrated sulfuric acid at 200°. This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2018). < n.1871 |
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