Orcin

Orcin

Chembox new
ImageFile = Orcin.png ImageSize = 150px
IUPACName = 5-Methyl-1,3-benzenediol
OtherNames = 3,5-Dihydroxytoluene
Section1 = Chembox Identifiers
CASNo = 504-15-4
PubChem =
SMILES = Cc1cc(O)cc(O)c1
Section2 = Chembox Properties
Formula = C7H8O2
MolarMass = 124.14 g/mol
Appearance =
Density =
MeltingPt = 110.0-110.5 °C
BoilingPt = 289.5 °C
Solubility =
Section3 = Chembox Hazards
MainHazards =
FlashPt =
Autoignition =

Orcin, or 3,5-dihydroxytoluene, C6H3(CH3)(OH)2, is an organic compound found in many lichens including "Rocella tinctoria" and "Lecanora", and formed by fusing extract of aloes with potash.

It may be synthesized from toluene; more interesting is its production when acetone dicarboxylic ester is condensed with the aid of sodium. It crystallizes in colorless prisms with one molecule of water, which redden on exposure to air. Ferric chloride gives a bluish-violet coloration with the aqueous solution. Unlike resorcinol it does not give a fluorescein with phthalic anhydride. Oxidation of the ammoniacal solution gives orcein, C28H24N2O7, the chief constituent of the natural dye archil. Homo-pyrocatechin is an isomer (CH1: OH: OH= 1 3 :4), found as its methyl ether (creosol) in beech-wood tar.

ee also

* Resorcinol

References

*1911

External links


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Look at other dictionaries:

  • Orcin — Or cin, n. [Etymology uncertain: cf. F. orcine.] (Chem.) A colorless crystalline substance, {C6H3.CH3.(OH)2}, which is obtained from certain lichens ({Roccella}, {Lecanora}, etc.), also from extract of aloes, and artificially from certain… …   The Collaborative International Dictionary of English

  • Orcin — Orcin, ein von Robiquet in mehren Flechten entdeckter Körper. Man unterscheidet Alpha u. Betaorcin. a) Das Alphaorcin (Orcit), C14H8O4 + 2HO, erhält man, wenn man den Kalkauszug der Orseilleflechten längere Zeit an der Luft kocht, den Kalk mit… …   Pierer's Universal-Lexikon

  • Orcīn — (Orcit) C7H8O2 oder C6H3(CH3)(OH)2 findet sich zum Teil fertig gebildet in den Flechten (Roccella , Lecanora Arten), die zur Darstellung von Orseille und Lackmus dienen, und entsteht aus der in diesen Flechten enthaltenen Orsellinsäure… …   Meyers Großes Konversations-Lexikon

  • Orcin — Strukturformel Allgemeines Name Orcin Andere Namen …   Deutsch Wikipedia

  • Orcin — Or|cin [vermutlich zu ↑ Orcein ↑ in (3)], das; s; Syn.: Orcinol, (systematisch:) 5 Methylbenzol 1,3 diol, 3,5 Dihydroxytoluol: aus Flechtenfarbstoffen isolierbare farblose Kristalle, Smp. 107 °C, die als Reagenz (↑ Bial Reagenz, Orcinol Methode)… …   Universal-Lexikon

  • orcin — noun The organic compound 3,5 dihydroxytoluene, found in many lichens and synthesizable from toluene …   Wiktionary

  • orcin — SYN: orcinol. * * * or·cin (orґsin) orcinol …   Medical dictionary

  • orcin — porcin …   Dictionnaire des rimes

  • örcin — is., esk. İp merdiven …   Çağatay Osmanlı Sözlük

  • orcin — or·cin …   English syllables

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