| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,907,697,970 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Guaiacol |
Also found in: Dictionary/thesaurus, Medical, Wikipedia | 0.01 sec. |
|
|
guaiacol [′gwī·ə‚kȯl]
(organic chemistry) C6H4(OH)OCH3A colorless, crystalline compound, soluble in water; used as a reagent to determine the presence of such substances as lignin, narceine, and nitrous acid. Guaiacol an organic compound with a strong, characteristic smell. It is a monomethyl ether of pyrocatechol. Colorless crystals: melting point, 28.4° C; boiling point, 205° C. Readily soluble in ethanol and chloroform and poorly soluble in petroleum ether; it dissolves iodine and sulfur. Ferric chloride gives an alcohol solution of guaiacol a blue coloration verging on green. Guaiacol is present in the distillation products of guaiacum, in the high-boiling distillates of beech tar, and in the dry distillation products of wood of leaf-bearing and coniferous species. Guaiacol is produced synthetically by partial methylation of pyrocatechol or by diazotization of o-anisidine and decomposition of the diazo compound with water. It is used to synthesize vanillin and medicinal preparations. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Mentioned in | ? | References in periodicals archive | ? | Encyclopedia browser | ? | Full browser | ? | |||
|---|---|---|---|---|---|---|---|---|---|---|
No references found | The predominant odorants in the soy yogurts included (E,E)-2,4-decadienal, beta-damascenone, trans-4,5-epoxy-(E)-2-decenal, 2-pentylpyridine, 1-octen-3-one, dimethyltrisulfide, (E,E)-2,4-nonadienal, p-cresol, p-vinyl guaiacol, o-aminoacetophenone, acetic acid, 3-/2-methylbutanoic acid and octanoic acid. The majority is synthesized in chemistry labs, and typically made from lignin, a constituent of wood left over from the paper-making industry, or guaiacol, which is derived from wood creosote. Reaction of chromic acid with lignin model compounds such as guaiacol and catechol indicates that chromic acid photostabilizes wood by reacting with lignin to create photostable lignin complexes enabling energy transfer or energy emittance from wooden surfaces. |
Guaiacol |
Guadix GUADLAC Guafenisin GUAG Guage Guage Guage Guage Guahan Guahan Guahan Guåhan Guåhan Guåhan Guåhån Guåhån Guåhån guaiac guaiac guaiac Guaiac (disambiguation) Guaiac Fecal-Occult Blood Test Guaiac test Guaiac test Guaiac test Guaiac test Guaiac test guaiac wood guaiac-negative guaiac-positive Guaiacol guaiacol glyceryl etherguaiacol glyceryl ether guaiacol glyceryl ether guaiacol poisoning Guaiacum Guaiacum Guaiacum Guaiacum officinale Guaiacum sanctum guaiacum wood guaiacums guaiacums Guaiazulene Guaicuruan languages guaifenesin guaifenesin guaifenesin Guaifenisin Guainia River Guainía River Guaiocol Guaiocol Guaiocol Guaiphenesin Guaira Guaíra Guaira Falls Guajacum Guajacum Guajillo | |||||||
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|