orcinoln.

Brit.

/ˈɔːsᵻnɒl/, U.S.

/ˈɔrsəˌnɑl/,

/ˈɔrsən(ə)l/

Origin: Formed within English, by derivation. Etymons: orcin n., -ol suffix.

Etymology: < orcin n. + -ol suffix.

Chemistry.

A colourless crystalline phenol which is obtained from orchil and other lichens, turns red on exposure to air, and is used as a reagent for pentose sugars (including ribose and ribonucleic acids); 5-methyl-1,3-benzenediol (monohydrate), CH₃C₆H₃(OH)₂ [.H₂O]. Cf. earlier orcin n., orcein n.

ΘΚΠ

the world > matter > chemistry > chemical tests > [noun] > reagents > other

Millon's reagent1872

orcinol1880

rubeanic acid1891

tetrazolium1895

Schiff reagent1897

Tollens'(s) reagent1904

the world > matter > chemistry > organic chemistry > crystalline substances > [noun] > others

amygdalin1651

asparagine1813

ambrein1820

aloin1828

orcin1833

anemonin1838

guaranin1838

helenin1838

puteanic acid1838

styracin1838

alloxanic acid1839

roccelline1840

sinapisine1840

lilacine1842

syringin1843

orsellic acid1848

roccellinin1848

rhamnetin1858

sapogenin1862

frangulin1864

phycite1864

fisetin1865

nucin1866

phlorone1866

piperonal1869

apiol1872

stercorin1873

juglone1878

orcinol1880

kinoin1881

ursone1885

iridin1894

saponarin1902

sambunigrin1905

lepton1921

leuco-taxin1937

lotaustralin1938

ionophore1955

the world > matter > chemistry > chemical reactions or processes > [noun] > substances involved in > reagent > specific

Millon's reagent1872

orcinol1880

1880 Jrnl. Chem. Soc. 38 113 (heading) Resorcinol and orcinol derivatives.

1921 W. T. K. Braunholtz tr. C. L. Moureu Fund. Princ. Org. Chem. vii. 372 An ammoniacal solution of orcinol undergoes oxidation in the air, giving orceïn,..which is a red dyestuff.

1969 Phytochemistry 8 2223 Orcinol (5-methylresorcinol) has been detected for the first time in higher plants, in ten species of the Ericaceae.

1973 N. C. Mishra et al. in M. C. Niu & S. J. Segal Role of RNA in Reprod. & Devel. 261 DNA and RNA were determined chemically by diphenylamine and orcinol reactions respectively.

2001 Jrnl. Molecular Biol. 305 851 The radical scavenger orcinol was found to decrease radiation damage to the crystals, during data collection at room temperature.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	orcinol
释义	orcinoln. Brit. /ˈɔːsᵻnɒl/, U.S. /ˈɔrsəˌnɑl/, /ˈɔrsən(ə)l/ Origin: Formed within English, by derivation. Etymons: orcin n., -ol suffix. Etymology: < orcin n. + -ol suffix. Chemistry. A colourless crystalline phenol which is obtained from orchil and other lichens, turns red on exposure to air, and is used as a reagent for pentose sugars (including ribose and ribonucleic acids); 5-methyl-1,3-benzenediol (monohydrate), CH₃C₆H₃(OH)₂ [.H₂O]. Cf. earlier orcin n., orcein n. ΘΚΠ the world > matter > chemistry > chemical tests > [noun] > reagents > other Millon's reagent1872 orcinol1880 rubeanic acid1891 tetrazolium1895 Schiff reagent1897 Tollens'(s) reagent1904 the world > matter > chemistry > organic chemistry > crystalline substances > [noun] > others amygdalin1651 asparagine1813 ambrein1820 aloin1828 orcin1833 anemonin1838 guaranin1838 helenin1838 puteanic acid1838 styracin1838 alloxanic acid1839 roccelline1840 sinapisine1840 lilacine1842 syringin1843 orsellic acid1848 roccellinin1848 rhamnetin1858 sapogenin1862 frangulin1864 phycite1864 fisetin1865 nucin1866 phlorone1866 piperonal1869 apiol1872 stercorin1873 juglone1878 orcinol1880 kinoin1881 ursone1885 iridin1894 saponarin1902 sambunigrin1905 lepton1921 leuco-taxin1937 lotaustralin1938 ionophore1955 the world > matter > chemistry > chemical reactions or processes > [noun] > substances involved in > reagent > specific Millon's reagent1872 orcinol1880 1880 Jrnl. Chem. Soc. 38 113 (heading) Resorcinol and orcinol derivatives. 1921 W. T. K. Braunholtz tr. C. L. Moureu Fund. Princ. Org. Chem. vii. 372 An ammoniacal solution of orcinol undergoes oxidation in the air, giving orceïn,..which is a red dyestuff. 1969 Phytochemistry 8 2223 Orcinol (5-methylresorcinol) has been detected for the first time in higher plants, in ten species of the Ericaceae. 1973 N. C. Mishra et al. in M. C. Niu & S. J. Segal Role of RNA in Reprod. & Devel. 261 DNA and RNA were determined chemically by diphenylamine and orcinol reactions respectively. 2001 Jrnl. Molecular Biol. 305 851 The radical scavenger orcinol was found to decrease radiation damage to the crystals, during data collection at room temperature. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < n.1880
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