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naphthol

 
Dictionary: naph·thol   (năf'thôl', -thōl', -thŏl', năp'-) pronunciation also naph·tol
 
(-tôl, -tōl, -tŏl)
n.

An organic compound, C10H7OH, occurring in two isomeric forms, alpha-naphthol and beta-naphthol.

[NAPHTH(ALENE) + –OL2.]


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naphthol (năf'thôl) , C10H7OH, either of two crystalline monohydric alcohols. The naphthols are position isomers, differing in the location of the hydroxyl group, [sbond]OH, on the carbon skeleton of naphthalene; α-naphthol is 1-hydroxynaphthalene and β-naphthol is 2-hydroxynaphthalene: The naphthols have a number of similar properties. They melt at 95°C and 122°C and boil at 279°C and 285°C, respectively; both are soluble in alcohol and ether and slightly soluble in hot water. One way in which they differ is the form of their crystals—α-naphthol crystallizes in prisms and β-naphthol in plates. The naphthols are prepared by reacting naphthalene with sulfuric acid and hydrolyzing the resultant sulfate ester by heating it with sodium hydroxide solution. Both naphthols exhibit antiseptic properties. They are used in the synthesis of certain azo dyes and antioxidants for rubbers. Naphthol solutions are used in chemical analysis to detect the ferric ion; dissolved ferric ion turns an α-naphthol solution violet and turns a β-naphthol solution green.


 
Veterinary Dictionary: naphthol
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A phenol occurring in coal tar: α-naphthol (1-hydroxynaphthalene) or β-naphthol (2-hydroxynaphthalene). It has antiseptic properties and is used in compound form as a skin antiseptic.

 
Wikipedia: Naphthol
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Naphthol may refer to:



 
Translations: Naphthol
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Dansk (Danish)
n. - naphtol

Nederlands (Dutch)
naftol

Français (French)
n. - naphtol

Deutsch (German)
n. - (chem.) Naphthol

Ελληνική (Greek)
n. - (χημ.) ναφθόλη

Italiano (Italian)
naftolo

Português (Portuguese)
n. - naftol (m) (Quím.)

Русский (Russian)
нафтол

Español (Spanish)
n. - naftol

Svenska (Swedish)
n. - naftol

中文(简体)(Chinese (Simplified))
奈酚

中文(繁體)(Chinese (Traditional))
n. - 奈酚

한국어 (Korean)
n. - 나프톨(방부제,염료의 원료)

日本語 (Japanese)
n. - ナフトール

العربيه (Arabic)
‏(الاسم) النفثول‏

עברית (Hebrew)
n. - ‮נפתול (חומר המשמש לצביעה ולחיטוי)‬


 
 

 

Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
Columbia Encyclopedia. The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2003, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/  Read more
Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Naphthol" Read more
Translations. Copyright © 2007, WizCom Technologies Ltd. All rights reserved.  Read more

 

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