tropaeolinn.

Brit.

/trə(ʊ)ˈpiːəlɪn/, U.S.

/troʊˈpiəlᵻn/

Forms: 1800s tropaolin, 1800s– tropaeolin, 1800s– tropaeoline, 1800s– tropeolin.

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: tropaeolum n., -in suffix¹.

Etymology: < tropaeolum n.) + -in suffix¹, after German Tropäolin (1878 or earlier, apparently originally a brand name). Apparently so called from the resemblance of the colours of the dyes to those of the flowers of some species of Tropaeolum.

Chemistry.

Any of a group of orange and yellow sulphonated azo dyes, some of which are used as pH indicators. Frequently with capital letter, numeral, etc., as a postmodifier, denoting a particular dye of this group, as tropaeolin O.

ΘΚΠ

the world > matter > colour > named colours > orange > colouring matter > [noun] > dyes

alcanna1526

henna1600

Egyptian privet1825

aurantia1877

tropaeolin1878

tartrazine1894

1878 Chem. News 31 May 228/1 W. v. Miller proposes the colour tropeolin, discovered by O. Witt,..as an indicator for the presence of an acid in volumetric analysis.

1878 Chem. News 9 Aug. 71/1 (title) Tropæolin as an alkalimetric indicator.

1880 Jrnl. Soc. Arts 446 This body has been used as a dye, under the name of Tropæoline O.

1907 Calif. State Jrnl. Med. 5 135/2 None or a trace only was found with tropeolin as the indicator.

1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xxii. 426 Resorcin yellow.., obtained by coupling a diazotized solution of sulphanilic acid with an alkaline solution of resorcinol, is known as Tropæolin O.

1955 Science 4 Feb. 169/2 This technique was checked by the application of tropaeolin 000 to a transfer wick.

2001 C. A. Reddy & Z. Mathew in G. M. Gadd Fungi Bioremediation iii. 64 P. chrysosporium has been reported to decolorize azo dyes Congo Red, Orange II and Tropaeolin.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).

单词	tropaeolin
释义	tropaeolinn. Brit. /trə(ʊ)ˈpiːəlɪn/, U.S. /troʊˈpiəlᵻn/ Forms: 1800s tropaolin, 1800s– tropaeolin, 1800s– tropaeoline, 1800s– tropeolin. Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: tropaeolum n., -in suffix¹. Etymology: < tropaeolum n.) + -in suffix¹, after German Tropäolin (1878 or earlier, apparently originally a brand name). Apparently so called from the resemblance of the colours of the dyes to those of the flowers of some species of Tropaeolum. Chemistry. Any of a group of orange and yellow sulphonated azo dyes, some of which are used as pH indicators. Frequently with capital letter, numeral, etc., as a postmodifier, denoting a particular dye of this group, as tropaeolin O. ΘΚΠ the world > matter > colour > named colours > orange > colouring matter > [noun] > dyes alcanna1526 henna1600 Egyptian privet1825 aurantia1877 tropaeolin1878 tartrazine1894 1878 Chem. News 31 May 228/1 W. v. Miller proposes the colour tropeolin, discovered by O. Witt,..as an indicator for the presence of an acid in volumetric analysis. 1878 Chem. News 9 Aug. 71/1 (title) Tropæolin as an alkalimetric indicator. 1880 Jrnl. Soc. Arts 446 This body has been used as a dye, under the name of Tropæoline O. 1907 Calif. State Jrnl. Med. 5 135/2 None or a trace only was found with tropeolin as the indicator. 1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xxii. 426 Resorcin yellow.., obtained by coupling a diazotized solution of sulphanilic acid with an alkaline solution of resorcinol, is known as Tropæolin O. 1955 Science 4 Feb. 169/2 This technique was checked by the application of tropaeolin 000 to a transfer wick. 2001 C. A. Reddy & Z. Mathew in G. M. Gadd Fungi Bioremediation iii. 64 P. chrysosporium has been reported to decolorize azo dyes Congo Red, Orange II and Tropaeolin. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022). < n.1878
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