单词 | difluan |
释义 | † difluann. Chemistry. Obsolete. A bitter-tasting deliquescent substance of uncertain identity obtained by heating alloxanic acid.The substance was later identified with allanturic acid (allanturic acid n. at allanturic adj.). ΚΠ 1845 Lancet 20 Sept. 306/2 A loose powder is obtained, which becomes fluid directly when exposed to air, and thence its name. Difluan is easily dissolved in water. 1853 D. Breed tr. C. Löwig Princ. Org. & Physiol. Chem. 341 If the aqueous solution be heated above 60°, carbonic acid is evolved, whilst leucoturic acid and difluan are formed. 1855 H. Watts tr. L. Gmelin Hand-bk. Chem. IX. 448 Diffluan [Ger. Diffluan], in all its relations, appears to be identical with allanturic acid. 1921 Jrnl. Chem. Soc. 120 i. 816 It is shown to be decomposed by hot water into Schlieper's leucoturic acid, a second substance (see later), and difluan. This entry has been updated (OED Third Edition, March 2016; most recently modified version published online September 2021). < n.1845 |
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